Control Signaling for High Frequency Networks

ABSTRACT

There is disclosed method of operating a receiving radio node (10, 100) in a wireless communication network, the method comprising receiving data signaling based on a data signaling indication, the data signaling indication indicating data signaling of an unspecified duration, wherein receiving is based on a stop indication. The disclosure also pertains to related devices and methods.

TECHNICAL FIELD

This disclosure pertains to wireless communication technology, inparticular for high frequencies.

BACKGROUND

For future wireless communication systems, use of higher frequencies isconsidered, which allows large bandwidths to be used for communication.However, use of such higher frequencies brings new problems, for exampleregarding physical properties and timing. Ubiquitous or almostubiquitous use of beamforming, with often comparatively small beams, mayprovide additional complications that need to be addressed. Inparticular, the data rates and required processing speed and/or latencyfor high frequency networks are expected to be significantly higher thancurrent systems can provide.

SUMMARY

It is an object of this disclosure to provide improved approaches ofhandling wireless communication, in particular regarding data signaling.The approaches are particularly suitable for millimeter wavecommunication, in particular for radio carrier frequencies around and/orabove 52.6 GHz, which may be considered high radio frequencies (highfrequency) and/or millimeter waves. The carrier frequency/ies may bebetween 52.6 and 140 GHz, e.g. with a lower border between 52.6, 55, 60,71 GHz and/or a higher border between 71, 72, 90, 114, 140 GHz orhigher, in particular between 55 and 90 GHz, or between 60 and 72 GHz;however, higher frequencies may be considered, in particular frequencyof 71 GHz or 72 GHz or above, and/or 100 GHz or above, and/or 140 GHz orabove. The carrier frequency may in particular refer to a centerfrequency or maximum frequency of the carrier. The radio nodes and/ornetwork described herein may operate in wideband, e.g. with a carrierbandwidth of 1 GHz or more, or 2 GHz or more, or even larger, e.g. up to8 GHz; the scheduled or allocated bandwidth may be the carrierbandwidth, or be smaller, e.g. depending on channel and/or procedure. Insome cases, operation may be based on an OFDM waveform or a SC-FDMwaveform (e.g., downlink and/or uplink), in particular aFDF-SC-FDM-based waveform. However, operation based on a single carrierwaveform, e.g. SC-FDE (which may be pulse-shaped or Frequency DomainFiltered, e.g. based on modulation scheme and/or MCS), may be consideredfor downlink and/or uplink. In general, different waveforms may be usedfor different communication directions. Communicating using or utilisinga carrier and/or beam may correspond to operating using or utilising thecarrier and/or beam, and/or may comprise transmitting on the carrierand/or beam and/or receiving on the carrier and/or beam. Operation maybe based on and/or associated to a numerology, which may indicate asubcarrier spacing and/or duration of an allocation unit and/or anequivalent thereof, e.g., in comparison to an OFDM based system. Asubcarrier spacing or equivalent frequency interval may for examplecorrespond to 960 kHZ, or 1920 kHz, e.g. representing the bandwidth of asubcarrier or equivalent.

The approaches are particularly advantageously implemented in a future6^(th) Generation (6G) telecommunication network or 6G radio accesstechnology or network (RAT/RAN), in particular according to 3GPP (3^(rd)Generation Partnership Project, a standardisation organization). Asuitable RAN may in particular be a RAN according to NR, for examplerelease 18 or later, or LTE Evolution. However, the approaches may alsobe used with other RAT, for example future 5.5G systems or IEEE basedsystems.

There is disclosed a method of operating a receiving radio node in awireless communication network. The method comprises receiving datasignaling based on a data signaling indication, the data signalingindication indicating data signaling of an unspecified duration, whereinreceiving is based on a stop indication.

Moreover, there is considered a receiving radio node for a wirelesscommunication network. The receiving radio node is adapted for receivingdata signaling based on a data signaling indication, the data signalingindication indicating data signaling of an unspecified duration, whereinreceiving is based on a stop indication.

A method of operating a transmitting radio node in a wirelesscommunication network is considered. The method comprises transmitting adata signaling indication to a receiving radio node, and transmittingdata signaling associated to the data signaling indication. The datasignaling indication indicates data signaling of an unspecifiedduration. The method further comprises transmitting a stop indication tothe receiving radio node.

There is also disclosed a transmitting radio node for a wirelesscommunication network. The transmitting radio node is adapted fortransmitting a data signaling indication to a receiving radio node, andfor transmitting data signaling associated to the data signalingindication. The data signaling indication indicates data signaling of anunspecified duration, the transmitting radio node further being adaptedfor transmitting a stop indication to the receiving radio node.

A stop indication may in general be indicated based on error codingand/or an identifier, in particular a CRC and/or RNTI. It may beconsidered that a CRC is scrambled with a specific RNTI to indicate thestop (and/or a counter or counter value; different scramblings oridentifiers may be used for different counter values). In some cases, aspecific CRC polynomial may be used for a stop indication and/or countervalue. The receiving radio node may apply such to determine whether astop indication or counter is represented.

In some cases, the stop indication may be represented by one of aplurality of counters. The counters may count down units (e.g.,allocation units and/or code blocks and/or transport blocks and/or othertime units) until the data signaling stops. Different counters (orvalues of a counter) may be included in different code blocks and/orallocation units and/or signalings, e.g. control signaling. Thus, thereceiving radio node may determine whether or not it missed atransmission, and/or may be aware of an stop even if it missed receptionof the stop indication, e.g., based on a preceding counter. There may beat two or more, or three or more, or four or more different countervalues, which may be provided at different times (e.g., allocationunits), Zoo indicating different (decreasing) times until stop. Eachcounter or value may function as separate stop indication. A counter mayindicate a value of N, wherein N=0 may indicate that the transmissionstops, N=1 may indicate the transmission stops after the next allocationunit (or time unit or code block or transport block), etc. A differentconvention for numbering may be used (e.g., with N=1 indicating a stop,etc) in an analogous manner. The counter values may be contiguous, orjump; for example, they may indicate a stop in 1, 2, 4, 8 units, and/orin powers of 2. Other combinations may be used.

It may be considered that the stop indication is represented by asignaling sequence, no in particular a reference signaling sequence. Thesignaling sequence may be inserted into an allocation unit carrying datasignaling, e.g. comprising 10% or less, or 5% or less of the number ofthe modulation symbols included in the allocation unit, in particular intime domain. The reference signaling sequence may represent timingreference signaling and/or phase tracking reference signaling. In somecases, the reference signaling sequence may represent a demodulationreference signaling sequence, which may be carried by a specificallocation unit, which may for example not carry data signaling. Theremay be available a set of sequences; a specific sequence (e.g, out ofthe set) may represent a stop indication. In some cases, differentcounter values may be indicated with different sequences, e.g. from theset of sequences. Different sequences may be based on the same rootsequences, e.g. based on a cover code (e.g., orthogonal cover code)and/or cyclic shift and/or phase shift or similar. The signalingsequence may be trailing or leading data signaling symbols, or may beincluded in between data signaling symbols carried on an allocationunit.

In general, it may be considered that the receiving radio node isconfigured with information characterising the stop indication. Forexample, it may indicate which type of stop indication is used, and/orwhich counter values are represented by which signal form, and/or whichsequence and/or CRC (or polynomial or scrambling identity) and/oridentity represents a stop indication and/or which counter or countervalue.

It may be considered that the stop indication may be carried by the datasignaling. For example, the stop indication may be included in aninformation or control element included in the data signaling, e.g. aheader and/or MAC control element or information element. Alternatively,or additionally, a stop flag and/or counter value may be included, e.g.at the beginning or end of a code block and/or data signaling. The stopindication may be provided such that decoding may be performed in timeto stop monitoring or decoding. Thus, no additional signaling may beneeded. The stop indication may be protected and/or covered by errorcoding of the data signaling, e.g. error detection coding and/or forwarderror correction.

In some cases, the stop indication may be separate from the datasignaling, e.g. as a separate signal or signaling sequence, or in adifferent channel, e.g. a control channel like a PDCCH or specific stopchannel. Thus, quick processing may be facilitated, without decodinghaving to be performed.

It may be considered that the stop indication is one of a plurality ofstop indications, e.g. different types of stop indications as describedherein, and/or represented by a plurality of counters or counter values.Thus, redundancy is provided.

In general, a stop indication may be included in the last allocationunit carrying data signaling. The stop indication may in particular berepresented by padding, e.g. a minimum or threshold number of zeros orones, which may indicate that no further data is transmitted.

In some cases, the stop indication may be represented by controlsignaling, e.g. on a control channel or stop channel. This may inparticular be useful if different nodes are involved, and/or to providea quick stop. The control signaling may use a different transmissionpower level (e.g., a higher transmission power) and/or modulation thanthe data signaling, e.g. to provide significantly different signalingcharacteristics. A specific signaling format may be used, e.g. a DCIformat or stop channel format.

The receiving radio node may comprise processing circuitry and/or radiocircuitry, in particular a receiver and/or transceiver, for receivingthe data signaling and/or decoding the data signaling. Receiving maycomprise decoding and/or demodulation and/or passing on decodedinformation to a higher layer of the receiving radio node. Receivingbased on a stop indication may comprise stopping monitoring and/ordecoding after the stop indicated (e.g., after the time indicated forthe stop). The receiving radio mode may be implemented as a wirelessdevice, e.g., a terminal or user equipment. In some cases, in particulara IAB or relay scenario, it may be implemented as a network node like abase station or IAB node or relay node.

The transmitting radio node may comprise processing circuitry and/orradio circuitry, in particular a transmitter and/or transceiver, fortransmitting the data signaling and/or encoding the data signalingand/or transmitting the data signaling indication and/or the stopindication, and/or for mapping user or payload data to resources fordata signaling and/or for determining the data signaling indicationand/or stop indication. Transmitting may comprise, and/or be based on,mapping user data and/or payload data to transmission resources. Thetransmitting radio mode may be implemented as a network node, e.g. abase station or IAB node or relay node. In some cases, in particular asidelink scenario, it may be implemented as a wireless device, e.g. aterminal or user equipment. Transmitting may comprise stoppingtransmitting of data signaling according to the stop indication, e.g. ata time (e.g. allocation unit) indicated by the stop indication. Insteadof a transmission radio node, a node arrangement may be considered,which may comprise a plurality of different radio nodes, e.g. networknodes and/or transmission radio nodes. The different transmissions maybe provided by different nodes of such a node arrangement. Inparticular, there may be considered a transmission radio nodetransmitting data signaling and/or a data signaling indication and/or astop indicating as disclosed herein.

The approaches described herein allow continuous transmission of data toa receiver, e.g. PDSCH “until further notice”. The transmission maycontinue until stopped, without predefined specified end, with littleoverhead for control signaling required. The approaches cover differentways of providing a stop indication. The stop indication may beconsidered providing a control functionality, causing the receivingradio node to stop monitoring and/or decoding. This may allow retuningand/or turning off circuitry, e.g. for power saving purposes.

A data signaling indication may comprise one or more indicators and/orparameters and/or bit fields, which may be transmitted in the samemessage or transmission, or in different messages or transmission and/orlayers. The data signaling indication may indicate one or moretransmission parameters for the data signaling. A data signalingindication may be transmitted separately from the data signaling, inparticular in advance. It may be considered that the data signalingindication at least in part is transmitted with control signaling, e.g.on a physical control channel, and/or at least in part with higher layersignaling, e.g. MAC layer and/or RRC layer signaling. For example, oneor more (transmission) parameters of the data signaling indication maybe configured with higher layer signaling, for example frequencyresources and/or bandwidth and/or transmission power and/or maximumduration. It may be considered that the information represented by thedata signaling indication is transmitted and/or received before the datasignaling starts. Alternatively, or additionally, one or more parametersmay be provided with lower layer control signaling, e.g. physical layercontrol signaling, for example in a DCI message and/or on a physicalcontrol channel like a PDCCH. Such a message may trigger reception, e.g.based on configured (with higher layer signaling) transmissionparameters. Alternatively, or additionally, time domain information (inparticular start of the data signaling and/or minimum duration) may beindicated in such control signaling. A receiving radio node may operatebased on the data signaling indication, e.g. monitoring and/or tuningreception and/or decoding accordingly.

Transmission parameters may comprise in particular frequency resourcesand/or start (in time domain, e.g. in which allocation unit) and/ormodulation and/or coding (in particular, modulation and coding scheme)and/or code rate and/or beam parameters, e.g. pertaining to the beam inwhich the data signaling is transmitted) and/or MIMO parameter/s and/orparameter/s indicating an arrangement of code blocks of the datasignaling, and/or information regarding reception, e.g. antenna and/orbeams for reception, and/or information indicative of a beam pair to usefor transmission and/or reception.

The data signaling may be transmitted contiguously in time, or may beinterrupted at one or more occasions, e.g. for one or more allocationunits. Such occasions may for example correspond to time resources forcontrol signaling and/or measurement opportunities or similar. Datasignaling may comprise a series of code blocks mapped to, and/ortransmitted on, allocation units; the code blocks may be providedindependent of each other and/or represent information pertaining todifferent data streams and/or HARQ or ARQ processes. Code blocks may beindependently error encoded; the data signaling may correspond to aseries of independently or separately error encoded code blocks. In somecases, code blocks are mapped to allocation units to end with the end ofan allocation unit. For example, each code block may be mapped to oneallocation unit, or an integer number of code blocks may be mapped to aninteger number of allocation units. This allows independent and/orparallel processing of allocation units and/or code blocks.

Data signaling associated to the data signaling indication may be datasignaling having characteristics corresponding to the data signalingindication, and/or based on such characteristics. In general, datasignaling may be on a data channel, e.g. a physical data channel, inparticular a shared channel like PDSCH. However, in some cases, it maybe on a dedicated channel; this may be particularly useful in a heavilybeamformed system.

An unspecified duration may indicate that the data signaling will betransmitted until an unspecified end, such that the receiving radio nodemay have to listen and/or monitor resources accordingly. The end may beunspecified when starting, and/or the resources (in particular in timedomain) to be monitored or used may be unspecified when starting ortriggering the data signaling transmission. The unspecified duration maybe within a transmission phase, e.g. a downlink transmission phase, forexample in a TDD system. The transmission may utilise a single-carrierbased waveform. The unspecified duration may extend at least over aplurality of allocation units, in particular at least over 10, or atleast 20, or at least 50, or at least 100 allocation units, e.g. block260 symbols. The receiving radio node may be expected to be ready tomonitor for, and/or receive, data signaling and/or an stop or endindication. The timing for transmission and reception may be shiftedrelative to each other due to path traveling effects; however, the timestructure of signaling may be considered to be essentially the same fortransmitter and receiver.

It may be considered that the data signaling indication indicates amaximum duration of the data signaling. In particular in case the datasignaling reaches the maximum duration, a stop indication may beomitted. Thus, the receiving radio node may predict a latest point intime when other signaling may be available. The maximum duration in somecases may be represented by the duration of a downlink transmissionphase, e.g. in a TDD system.

In some cases, the data signaling indication may indicate a start of thedata signaling, for example a starting allocation unit. The start may beafter transmission and/or reception of the data signaling indication,e.g. indicated with an offset relative to indication of the start (theoffset may be in units of allocation units or in time units derived fromseconds or similar). In some variants, the start may be indicated inwith physical layer control signaling. A trigger of configuredtransmission parameters may be considered an indication of a start ofthe data signaling of unspecified duration.

In some cases, the end of the data signaling is indicated with a stopindication. The stop indication may be included in the data signaling,or provided separately, e.g. with physical layer control signaling, e.g.on a (possible dedicated) stop channel or a downlink control channellike PDCCH. The stop indication may be provided after data signalingtransmission has started; it may be inserted into the data signalingbefore the actual end, e.g. to allow for decoding, or may indicate theactual end, e.g. trailing the data signaling and/or at the tail of thedata signaling. Alternatively, or additionally, the receiving radio nodemay determine the end based on data signaling stopping, e.g. based onthe received power dropping below a threshold and/or not being able todecode.

It may be considered that the data signaling extends over a plurality ofallocation units, in particular at least 10, or at least 20, or at least50 or at least 100, or at least 200. Alternatively, or additionally, thedata signaling may extend over at least a subframe, which may forexample have a predefined duration, e.g. 1 ms.

In some variants, the data signaling indication may indicate a minimumduration of the data signaling. Such indication may for example beprovided with physical layer control signaling, e.g. in a message orsignaling format triggering the data signaling reception and/orindicating the start of the data signaling. Such indication may forexample be provided based on a buffer status of the transmitting radionode, allowing more predictable behaviour and monitoring.

It may be considered that a last allocation unit carrying data signalingmay be padded. This may ensure the same processing structure can be usedfor all allocation units.

The padding may ensure that the allocation unit carries the same numberof bits as the other allocation units on which data signaling istransmitted.

It may be considered that the data signaling is transmitted usingconstant transmission parameters, e.g. constant over the transmissiontime. Such parameters may in particular indicate modulation and/orcoding and/or modulation and coding scheme and/or transmission powerand/or reference signaling density and/or bandwidth and/or frequencyresources (e.g., bandwidth part and/or carrier) and/or waveform. Thus,the receiving radio node does not have to change associated receptionparameters and/or circuitry settings.

A code block may in general represent bits of information (e.g., userdata and/or payload) and/or error coding, and/or may be represented by acorresponding bit sequence. A code block (e.g., its bits orrepresentation) may be mapped to one or more modulation symbolscontained in the one or more allocation units (e.g., depending onmodulation and/or coding scheme and/or bandwidth and/or waveform). Theallocation unit may in some cases contain reference signaling, e.g.phase tracking reference signaling, which may for example be included asa sequence, e.g. in a fixed and/or predefined and/or configured orconfigurable location (e.g. in time domain) of the allocation unit.Control information like header information and/or similar from higherlayers may be represented by the information bits of the code block. Ingeneral, a code block may be padded (e.g. with zeros or ones) to allowoccupying an allocation unit, e.g. if the code block size otherwise istoo small to fully occupy one allocation unit. Alternatively, paddingsignaling may be used, e.g. padding symbols associated to the allocationunit not completely filled by a code block and/or its error codedrepresentation. An error coded representation of a code block maycomprise bits representing the information of the code block and/orerror detection coding and/or error correction coding; the informationbits may be directly included, or transformed (e.g., when using polarcoding for FEC).

A signaling sequence may correspond to a sequence of modulation symbols(e.g., in time domain, after DFT-spreading for a SC-FDM system, or infrequency domain for an OFDM system). The signaling sequence may bepredefined. For OFDM or SC-FDM, each element of a signaling sequence maybe mapped to a subcarrier; in general, for SC-based signaling, acorresponding mapping in time domain may be utilised (such that eachelement may use essentially the full synchronisation bandwidth). Asignaling sequence may comprise (ordered) modulation symbols, eachmodulation symbol representing a value of the sequence it is based on,e.g. based on the modulation scheme used and/or in a phase orconstellation diagram; for some sequences like Zadoff-Chu sequences,there may be a mapping between non-integer sequence elements andtransmitted waveform, which may not be represented in the context of amodulation scheme like BPSK or QPSK or higher. A signaling sequence maybe a physical layer signaling or signal, which may be devoid of higherlayer information.

A sequence may generally be considered to be based on a root sequence ifit can be constructed from the root sequence (or represents itdirectly), e.g. by shifting in phase and/or frequency and/or timedomain, and/or performing a cyclic shift and/or a cyclic extension,and/or copying/repeating and/or processing or operating on with a code.A cyclic extension of a sequence may comprise taking a part of thesequence (in particular a border part like a tail or beginning) andappending it to the sequence, e.g. at the beginning or end, for examplein time domain or frequency domain. Thus, a cyclic extended sequence mayrepresent a (root) sequence and at least a part repetition of the (root)sequence. Operations described may be combined, in any order, inparticular a shift and a cyclic extension. A cyclic shift in a domainmay comprise shifting the sequence in the domain within an interval,such that the total number of sequence elements is constant, and thesequence is shifted as if the interval represented a ring (e.g., suchthat starting from the same sequence element, which may appear atdifferent location in the interval), the order of elements is the sameif the borders of the intervals are considered to be continuous, suchthat leaving one end of the interval leads to entering the interval atthe other end). Processing and/or operating on with a code maycorrespond to constructing a sequence out of copies of a root sequence,wherein each copy is multiplied and/or operated on with an element ofthe code. Multiplying with an element of a code may represent and/orcorrespond to a shift (e.g., constant or linear or cyclic) in phaseand/or frequency and/or time domain, depending on representation. In thecontext of this disclosure, a sequence being based on and/or beingconstructed and/or processed may be any sequence that would result fromsuch construction or processing, even if the sequence is just read frommemory. Any isomorphic or equivalent or corresponding way to arrive atthe sequence is considered to be included by such terminology; theconstruction thus may be considered to define the characteristics of thesequence and/or the sequence, not necessarily a specific way toconstruct them, as there may be multiple equivalent ways that aremathematically equivalent. Thus, a sequence “based on” or “constructed”or similar terminology may be considered to correspond to the sequencebeing “represented by” or “may be represented by” or “representable as”.

There is also described a program product comprising instructionscausing processing circuitry to control and/or perform a method asdescribed herein. Moreover, a carrier medium arrangement carrying and/orstoring a program product as described herein is considered. Aninformation system comprising, and/or connected or connectable, to aradio node is also disclosed.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings are provided to illustrate concepts and approachesdescribed herein, and are not intended to limit their scope. Thedrawings comprise:

FIG. 1 , showing an exemplary radio node; and

FIG. 2 , showing another exemplary radio node.

DETAILED DESCRIPTION

FIG. 1 schematically shows a radio node, in particular a wireless deviceor terminal 10 or a UE (User Equipment), which may represent inparticular a receiving radio node. Radio node 10 comprises processingcircuitry (which may also be referred to as control circuitry) 20, whichmay comprise a controller connected to a memory. Any module of the radionode 10, e.g. a communicating module or determining module, may beimplemented in and/or executable by, the processing circuitry 20, inparticular as module in the controller. Radio node 10 also comprisesradio circuitry 22 providing receiving and transmitting or transceivingfunctionality (e.g., one or more transmitters and/or receivers and/ortransceivers), the radio circuitry 22 being connected or connectable tothe processing circuitry. An antenna circuitry 24 of the radio node 10is connected or connectable to the radio circuitry 22 to collect or sendand/or amplify signals. Radio circuitry 22 and the processing circuitry20 controlling it are configured for cellular communication with anetwork, e.g. a RAN as described herein, and/or for sidelinkcommunication (which may be within coverage of the cellular network, orout of coverage; and/or may be considered non-cellular communicationand/or be associated to a non-cellular wireless communication network).Radio node 10 may generally be adapted to carry out any of the methodsof operating a radio node like terminal or UE disclosed herein; inparticular, it may comprise corresponding circuitry, e.g. processingcircuitry, and/or modules, e.g. software modules. It may be consideredthat the radio node 10 comprises, and/or is connected or connectable, toa power supply.

FIG. 2 schematically shows a radio node 100, which may in particular beimplemented as a network node 100, for example an eNB or gNB or similarfor NR, and may represent in particular a transmitting radio node. Radionode 100 comprises processing circuitry (which may also be referred toas control circuitry) 120, which may comprise a controller connected toa memory. Any module, e.g. transmitting module and/or receiving moduleand/or configuring module of the node 100 may be implemented in and/orexecutable by the processing circuitry 120. The processing circuitry 120is connected to control radio circuitry 122 of the node 100, whichprovides receiver and transmitter and/or transceiver functionality(e.g., comprising one or more transmitters and/or receivers and/ortransceivers). An antenna circuitry 124 may be connected or connectableto radio circuitry 122 for signal reception or transmittance and/oramplification. Node 100 may be adapted to carry out any of the methodsfor operating a radio node or network node disclosed herein; inparticular, it may comprise corresponding circuitry, e.g. processingcircuitry, and/or modules. The antenna circuitry 124 may be connected toand/or comprise an antenna array. The node 100, respectively itscircuitry, may be adapted to perform any of the methods of operating anetwork node or a radio node as described herein; in particular, it maycomprise corresponding circuitry, e.g. processing circuitry, and/ormodules. The radio node 100 may generally comprise communicationcircuitry, e.g. for communication with another network node, like aradio node, and/or with a core network and/or an internet or local net,in particular with an information system, which may provide informationand/or data to be transmitted to a user equipment.

In general, a block symbol may represent and/or correspond to anextension in time domain, e.g. a time interval. A block symbol duration(the length of the time interval) may correspond to the duration of anOFDM symbol or a corresponding duration, and/or may be based and/ordefined by a subcarrier spacing used (e.g., based on the numerology) orequivalent, and/or may correspond to the duration of a modulation symbol(e.g., for OFDM or similar frequency domain multiplexed types ofsignaling). It may be considered that a block symbol comprises aplurality of modulation symbols, e.g. based on a subcarrier spacingand/or numerology or equivalent, in particular for time domainmultiplexed types (on the symbol level for a single transmitter) ofsignaling like single-carrier based signaling, e.g. SC-FDE or SC-FDMA(in particular, FDF-SC-FDMA or pulse-shaped SC-FDMA). The number ofsymbols may be based on and/or defined by the number of subcarrier to beDFTS-spread (for SC-FDMA) and/or be based on a number of FFT samples,e.g. for spreading and/or mapping, and/or equivalent, and/or may bepredefined and/or configured or configurable. A block symbol in thiscontext may comprise and/or contain a plurality of individual modulationsymbols, which may be for example 1000 or more, or 3000 or more, or 3300or more. The number of modulation symbols in a block symbol may be basedand/or be dependent on a bandwidth scheduled for transmission ofsignaling in the block symbol. A block symbol and/or a number of blocksymbols (an integer smaller than 20, e.g. equal to or smaller than 14 or7 or 4 or 2 or a flexible number) may be a unit (e.g., allocation unit)used or usable or intended e.g. for scheduling and/or allocation ofresources, in particular in time domain. To a block symbol (e.g.,scheduled or allocated) and/or block symbol group and/or allocationunit, there may be associated a frequency range and/or frequency domainallocation and/or bandwidth allocated for transmission.

An allocation unit, and/or a block symbol, may be associated to aspecific (e.g., physical) channel and/or specific type of signaling, forexample reference signaling. In some cases, there may be a block symbolassociated to a channel that also is associated to a form of referencesignaling and/or pilot signaling and/or tracking signaling associated tothe channel, for example for timing purposes and/or decoding purposes(such signaling may comprise a low number of modulation symbols and/orresource elements of a block symbol, e.g. less than 10% or less than 5%or less than 1% of the modulation symbols and/or resource elements in ablock symbol). To a block symbol, there may be associated resourceelements; a resource element may be represented in time/frequencydomain, e.g. by the smallest frequency unit carrying or mapped to (e.g.,a subcarrier) in frequency domain and the duration of a modulationsymbol in time domain. A block symbol may comprise, and/or to a blocksymbol may be associated, a structure allowing and/or comprising anumber of modulation symbols, and/or association to one or more channels(and/or the structure may dependent on the channel the block symbol isassociated to and/or is allocated or used for), and/or referencesignaling (e.g., as discussed above), and/or one or more guard periodsand/or transient periods, and/or one or more affixes (e.g., a prefixand/or suffix and/or one or more infixes (entered inside the blocksymbol)), in particular a cyclic prefix and/or suffix and/or infix. Acyclic affix may represent a repetition of signaling and/or modulationsymbol/s used in the block symbol, with possible slight amendments tothe signaling structure of the affix to provide a smooth and/orcontinuous and/or differentiable connection between affix signaling andsignaling of modulation symbols associated to the content of the blocksymbol (e.g., channel and/or reference signaling structure). In somecases, in particular some OFDM-based waveforms, an affix may be includedinto a modulation symbol. In other cases, e.g. some single carrier-basedwaveforms, an affix may be represented by a sequence of modulationsymbols within the block symbol. It may be considered that in some casesa block symbol is defined and/or used in the context of the associatedstructure.

Communicating may comprise transmitting or receiving. It may beconsidered that communicating like transmitting signaling is based on aSC-FDM based waveform, and/or corresponds to a Frequency Domain Filtered(FDF) DFTS-OFDM waveform. However, the approaches may be applied to aSingle Carrier based waveform, e.g. a SC-FDM or SC-FDE-waveform, whichmay be pulse-shaped/FDF-based. It should be noted that SC-FDM may beconsidered DFT-spread OFDM, such that SC-FDM and DFTS-OFDM may be usedinterchangeably. Alternatively, or additionally, the signaling (e.g.,first signaling and/or second signaling) and/or beam/s (in particular,the first received beam and/or second received beam) may be based on awaveform with CP or comparable guard time. The received beam and thetransmission beam of the first beam pair may have the same (or similar)or different angular and/or spatial extensions; the received beam andthe transmission beam of the second beam pair may have the same (orsimilar) or different angular and/or spatial extensions. It may beconsidered that the received beam and/or transmission beam of the firstand/or second beam pair have angular extension of 20 degrees or less, or15 degrees or less, or 10 or 5 degrees or less, at least in one ofhorizontal or vertical direction, or both; different beams may havedifferent angular extensions. An extended guard interval or switchingprotection interval may have a duration corresponding to essentially orat least N CP (cyclic prefix) durations or equivalent duration, whereinN may be 2, or 3 or 4. An equivalent to a CP duration may represent theCP duration associated to signaling with CP (e.g., SC-FDM-based orOFDM-based) for a waveform without CP with the same or similar symboltime duration as the signaling with CP. Pulse-shaping (and/or performingFDF for) a modulation symbol and/or signaling, e.g. associated to afirst subcarrier or bandwidth, may comprise mapping the modulationsymbol (and/or the sample associated to it after FFT) to an associatedsecond subcarrier or part of the bandwidth, and/or applying a shapingoperation regarding the power and/or amplitude and/or phase of themodulation symbol on the first subcarrier and the second subcarrier,wherein the shaping operation may be according to a shaping function.Pulse-shaping signaling may comprise pulse-shaping one or more symbols;pulse-shaped signaling may in general comprise at least one pulse-shapedsymbol. Pulse-shaping may be performed based on a Nyquist-filter. It maybe considered that pulse-shaping is performed based on periodicallyextending a frequency distribution of modulation symbols (and/orassociated samples after FFT) over a first number of subcarrier to alarger, second number of subcarriers, wherein a subset of the firstnumber of subcarriers from one end of the frequency distribution isappended at the other end of the first number of subcarriers.

In some variants, communicating may be based on a numerology (which may,e.g., be represented by and/or correspond to and/or indicate asubcarrier spacing and/or symbol time length) and/or an SC-FDM basedwaveform (including a FDF-DFTS-FDM based waveform) or a single-carrierbased waveform. Whether to use pulse-shaping or FDF on a SC-FDM orSC-based waveform may depend on the modulation scheme (e.g., MCS) used.Such waveforms may utilise a cyclic prefix and/or benefit particularlyfrom the described approaches. Communicating may comprise and/or bebased on beamforming, e.g. transmission beamforming and/or receptionbeamforming, respectively. It may be considered that a beam is producedby performing analog beamforming to provide the beam, e.g. a beamcorresponding to a reference beam. Thus, signaling may be adapted, e.g.based on movement of the communication partner. A beam may for examplebe produced by performing analog beamforming to provide a beamcorresponding to a reference beam. This allows efficient postprocessingof a digitally formed beam, without requiring changes to a digitalbeamforming chain and/or without requiring changes to a standarddefining beam forming precoders. In general, a beam may be produced byhybrid beamforming, and/or by digital beamforming, e.g. based on aprecoder. This facilitates easy processing of beams, and/or limits thenumber of power amplifiers/ADC/DCA required for antenna arrangements. Itmay be considered that a beam is produced by hybrid beamforming, e.g. byanalog beamforming performed on a beam representation or beam formedbased on digital beamforming. Monitoring and/or performing cell searchmay be based on reception beamforming, e.g. analog or digital or hybridreception beamforming. The numerology may determine the length of asymbol time interval and/or the duration of a cyclic prefix. Theapproaches described herein are particularly suitable to SC-FDM, toensure orthogonality, in particular subcarrier orthogonality, incorresponding systems, but may be used for other waveforms.Communicating may comprise utilising a waveform with cyclic prefix. Thecyclic prefix may be based on a numerology, and may help keepingsignaling orthogonal. Communicating may comprise, and/or be based onperforming cell search, e.g. for a wireless device or terminal, or maycomprise transmitting cell identifying signaling and/or a selectionindication, based on which a radio node receiving the selectionindication may select a signaling bandwidth from a set of signalingbandwidths for performing cell search.

A beam or beam pair may in general be targeted at one radio node, or agroup of radio nodes and/or an area including one or more radio nodes.In many cases, a beam or beam pair may be receiver-specific (e.g.,UE-specific), such that only one radio node is served per beam/beampair. A beam pair switch or switch of received beam (e.g., by using adifferent reception beam) and/or transmission beam may be performed at aborder of a transmission timing structure, e.g. a slot border, or withina slot, for example between symbols Some tuning of radio circuitry, e.g.for receiving and/or transmitting, may be performed. Beam pair switchingmay comprise switching from a second received beam to a first receivedbeam, and/or from a second transmission beam to a first transmissionbeam. Switching may comprise inserting a guard period to cover retuningtime; however, circuitry may be adapted to switch sufficiently quicklyto essentially be instantaneous; this may in particular be the case whendigital reception beamforming is used to switch reception beams forswitching received beams.

A reference beam may be a beam comprising reference signaling, based onwhich for example a of beam signaling characteristics may be determined,e.g. measured and/or estimated. A signaling beam may comprise signalinglike control signaling and/or data signaling and/or reference signaling.A reference beam may be transmitted by a source or transmitting radionode, in which case one or more beam signaling characteristics may bereported to it from a receiver, e.g. a wireless device. However, in somecases it may be received by the radio node from another radio node orwireless device. In this case, one or more beam signalingcharacteristics may be determined by the radio node. A signaling beammay be a transmission beam, or a reception beam. A set of signalingcharacteristics may comprise a plurality of subsets of beam signalingcharacteristics, each subset pertaining to a different reference beam.Thus, a reference beam may be associated to different beam signalingcharacteristics.

A beam signaling characteristic, respectively a set of suchcharacteristics, may represent and/or indicate a signal strength and/orsignal quality of a beam and/or a delay characteristic and/or beassociated with received and/or measured signaling carried on a beam.Beam signaling characteristics and/or delay characteristics may inparticular pertain to, and/or indicate, a number and/or list and/ororder of beams with best (e.g., lowest mean delay and/or lowestspread/range) timing or delay spread, and/or of strongest and/or bestquality beams, e.g. with associated delay spread. A beam signalingcharacteristic may be based on measurement/s performed on referencesignaling carried on the reference beam it pertains to. Themeasurement/s may be performed by the radio node, or another node orwireless device. The use of reference signaling allows improved accuracyand/or gauging of the measurements.

In some cases, a beam and/or beam pair may be represented by a beamidentity indication, e.g. a beam or beam pair number. Such an indicationmay be represented by one or more signaling sequences (e.g., a specificreference signaling sequences or sequences), which may be transmitted onthe beam and/or beam pair, and/or a signaling characteristic and/or aresource/s used (e.g., time/frequency and/or code) and/or a specificRNTI (e.g., used for scrambling a CRC for some messages ortransmissions) and/or by information provided in signaling, e.g. controlsignaling and/or system signaling, on the beam and/or beam pair, e.g.encoded and/or provided in an information field or as informationelement in some form of message of signaling, e.g. DCI and/or MAC and/orRRC signaling.

A reference beam may in general be one of a set of reference beams, thesecond set of reference beams being associated to the set of signalingbeams. The sets being associated may refer to at least one beam of thefirst set being associated and/or corresponding to the second set (orvice versa), e.g. being based on it, for example by having the sameanalog or digital beamforming parameters and/or precoder and/or the sameshape before analog beamforming, and/or being a modified form thereof,e.g. by performing additional analog beamforming. The set of signalingbeams may be referred to as a first set of beams, a set of correspondingreference beams may be referred to as second set of beams.

In some variants, a reference beam and/or reference beams and/orreference signaling may correspond to and/or carry random accesssignaling, e.g. a random access preamble. Such a reference beam orsignaling may be transmitted by another radio node. The signaling mayindicate which beam is used for transmitting. Alternatively, thereference beams may be beams receiving the random access signaling.Random access signaling may be used for initial connection to the radionode and/or a cell provided by the radio node, and/or for reconnection.Utilising random access signaling facilitates quick and early beamselection. The random access signaling may be on a random accesschannel, e.g. based on broadcast information provided by the radio node(the radio node performing the beam selection), e.g. withsynchronisation signaling (e.g., SSB block and/or associated thereto).The reference signaling may correspond to synchronisation signaling,e.g. transmitted by the radio node in a plurality of beams. Thecharacteristics may be reported on by a node receiving thesynchronisation signaling, e.g. in a random access process, e.g. a msg3for contention resolution, which may be transmitted on a physical uplinkshared channel based on a resource allocation provided by the radionode.

A delay characteristic (which may correspond to delay spreadinformation) and/or a measurement report may represent and/or indicateat least one of mean delay, and/or delay spread, and/or delaydistribution, and/or delay spread distribution, and/or delay spreadrange, and/or relative delay spread, and/or energy (or power)distribution, and/or impulse response to received signaling, and/or thepower delay profile of the received signals, and/or power delay profilerelated parameters of the received signal. A mean delay may representthe mean value and/or an averaged value of the delay spread, which maybe weighted or unweighted. A distribution may be distribution overtime/delay, e.g. of received power and/or energy of a signal. A rangemay indicate an interval of the delay spread distribution overtime/delay, which may cover a predetermined percentage of the delayspread respective received energy or power, e.g. 50% or more, 75% ormore, 90% or more, or 100%. A relative delay spread may indicate arelation to a threshold delay, e.g. of the mean delay, and/or a shiftrelative to an expected and/or configured timing, e.g. a timing at whichthe signaling would have been expected based on the scheduling, and/or arelation to a cyclic prefix duration (which may be considered on form ofa threshold). Energy distribution or power distribution may pertain tothe energy or power received over the time interval of the delay spread.A power delay profile may pertain to representations of the receivedsignals, or the received signals energy/power, across time/delay. Powerdelay profile related parameters may pertain to metrics computed fromthe power delay profile. Different values and forms of delay spreadinformation and/or report may be used, allowing a wide range ofcapabilities. The kind of information represented by a measurementreport may be predefined, or be configured or configurable, e.g. with ameasurement configuration and/or reference signaling configuration, inparticular with higher layer signaling like RRC or MAC signaling and/orphysical layer signaling like DCI signaling.

In general, different beam pair may differ in at least one beam; forexample, a beam pair using a first received beam and a firsttransmission beam may be considered to be different from a second beampair using the first received beam and a second transmission beam. Atransmission beam using no precoding and/or beamforming, for exampleusing the natural antenna profile, may be considered as a special formof transmission beam of a transmission beam pair. A beam may beindicated to a radio node by a transmitter with a beam indication and/ora configuration, which for example may indicate beam parameters and/ortime/frequency resources associated to the beam and/or a transmissionmode and/or antenna profile and/or antenna port and/or precoderassociated to the beam. Different beams may be provided with differentcontent, for example different received beams may carry differentsignaling; however, there may be considered cases in which differentbeams carry the same signaling, for example the same data signalingand/or reference signaling. The beams may be transmitted by the samenode and/or transmission point and/or antenna arrangement, or bydifferent nodes and/or transmission points and/or antenna arrangements.

Communicating utilising a beam pair or a beam may comprise receivingsignaling on a received beam (which may be a beam of a beam pair),and/or transmitting signaling on a beam, e.g. a beam of a beam pair. Thefollowing terms are to be interpreted from the point of view of thereferred radio node: a received beam may be a beam carrying signalingreceived by the radio node (for reception, the radio node may use areception beam, e.g. directed to the received beam, or benon-beamformed). A transmission beam may be a beam used by the radionode to transmit signaling. A beam pair may consist of a received beamand a transmission beam. The transmission beam and the received beam ofa beam pair may be associated to each and/or correspond to each other,e.g. such that signaling on the received beam and signaling on atransmission beam travel essentially the same path (but in oppositedirections), e.g. at least in a stationary or almost stationarycondition. It should be noted that the terms “first” and “second” do notnecessarily denote an order in time; a second signaling may be receivedand/or transmitted before, or in some cases simultaneous to, firstsignaling, or vice versa. The received beam and transmission beam of abeam pair may be on the same carrier or frequency range or bandwidthpart, e.g. in a TDD operation; however, variants with FDD may beconsidered as well. Different beam pairs may operate on the samefrequency ranges or carriers or bandwidth parts (e.g., such thattransmission beams operate on the same frequency range or carriers orbandwidth part, and received beams on the same frequency range orcarriers or bandwidth part (the transmission beam and received beams maybe on the same or different ranges or carriers or BWPs). Communicatingutilizing a first beam pair and/or first beam may be based on, and/orcomprise, switching from the second beam pair or second beam to thefirst beam pair or first beam for communicating. The switching may becontrolled by the network, for example a network node (which may be thesource or transmitter of the received beam of the first beam pair and/orsecond beam pair, or be associated thereto, for example associatedtransmission points or nodes in dual connectivity). Such controlling maycomprise transmitting control signaling, e.g. physical layer signalingand/or higher layer signaling. In some cases, the switching may beperformed by the radio node without additional control signaling, forexample based on measurements on signal quality and/or signal strengthof beam pairs (e.g., of first and second received beams), in particularthe first beam pair and/or the second beam pair. For example, it may beswitched to the first beam pair (or first beam) if the signal quality orsignal strength measured on the second beam pair (or second beam) isconsidered to be insufficient, and/or worse than correspondingmeasurements on the first beam pair indicate. Measurements performed ona beam pair (or beam) may in particular comprise measurements performedon a received beam of the beam pair. It may be considered that thetiming indication may be determined before switching from the secondbeam pair to the first beam pair for communicating. Thus, thesynchronization may be in place 8 and/or the timing indication may beavailable for synchronising) when starting communication utilizing thefirst beam pair or first beam. However, in some cases the timingindication may be determined after switching to the first beam pair orfirst beam. This may be in particular useful if first signaling isexpected to be received after the switching only, for example based on aperiodicity or scheduled timing of suitable reference signaling on thefirst beam pair, e.g. first received beam.

In some variants, reference signaling may be and/or comprise CSI-RS,e.g. transmitted by the network node. In other variants, the referencesignaling may be transmitted by a UE, e.g. to a network node or otherUE, in which case it may comprise and/or be Sounding ReferenceSignaling. Other, e.g. new, forms of reference signaling may beconsidered and/or used. In general, a modulation symbol of referencesignaling respectively a resource element carrying it may be associatedto a cyclic prefix.

Data signaling may be on a data channel, for example on a PDSCH orPSSCH, or on a dedicated data channel, e.g. for low latency and/or highreliability, e.g. a URLLC channel. Control signaling may be on a controlchannel, for example on a common control channel or a PDCCH or PSCCH,and/or comprise one or more DCI messages or SCI messages. Referencesignaling may be associated to control signaling and/or data signaling,e.g. DM-RS and/or PT-RS.

Reference signaling, for example, may comprise DM-RS and/or pilotsignaling and/or discovery signaling and/or synchronisation signalingand/or sounding signaling and/or phase tracking signaling and/orcell-specific reference signaling and/or user-specific signaling, inparticular CSI-RS. Reference signaling in general may be signaling withone or more signaling characteristics, in particular transmission powerand/or sequence of modulation symbols and/or resource distributionand/or phase distribution known to the receiver. Thus, the receiver canuse the reference signaling as a reference and/or for training and/orfor compensation. The receiver can be informed about the referencesignaling by the transmitter, e.g. being configured and/or signalingwith control signaling, in particular physical layer signaling and/orhigher layer signaling (e.g., DCI and/or RRC signaling), and/or maydetermine the corresponding information itself, e.g. a network nodeconfiguring a UE to transmit reference signaling. Reference signalingmay be signaling comprising one or more reference symbols and/orstructures. Reference signaling may be adapted for gauging and/orestimating and/or representing transmission conditions, e.g. channelconditions and/or transmission path conditions and/or channel (or signalor transmission) quality. It may be considered that the transmissioncharacteristics (e.g., signal strength and/or form and/or modulationand/or timing) of reference signaling are available for both transmitterand receiver of the signaling (e.g., due to being predefined and/orconfigured or configurable and/or being communicated). Different typesof reference signaling may be considered, e.g. pertaining to uplink,downlink or sidelink, cell-specific (in particular, cell-wide, e.g.,CRS) or device or user specific (addressed to a specific target or userequipment, e.g., CSI-RS), demodulation-related (e.g., DMRS) and/orsignal strength related, e.g. power-related or energy-related oramplitude-related (e.g., SRS or pilot signaling) and/or phase-related,etc.

References to specific resource structures like an allocation unitand/or block symbol and/or block symbol group and/or transmission timingstructure and/or symbol and/or slot and/or mini-slot and/or subcarrierand/or carrier may pertain to a specific numerology, which may bepredefined and/or configured or configurable. A transmission timingstructure may represent a time interval, which may cover one or moresymbols. Some examples of a transmission timing structure aretransmission time interval (TTI), subframe, slot and mini-slot. A slotmay comprise a predetermined, e.g. predefined and/or configured orconfigurable, number of symbols, e.g. 6 or 7, or 12 or 14. A mini-slotmay comprise a number of symbols (which may in particular beconfigurable or configured) smaller than the number of symbols of aslot, in particular 1, 2, 3 or 4, or more symbols, e.g. less symbolsthan symbols in a slot. A transmission timing structure may cover a timeinterval of a specific length, which may be dependent on symbol timelength and/or cyclic prefix used. A transmission timing structure maypertain to, and/or cover, a specific time interval in a time stream,e.g. synchronized for communication. Timing structures used and/orscheduled for transmission, e.g. slot and/or mini-slots, may bescheduled in relation to, and/or synchronized to, a timing structureprovided and/or defined by other transmission timing structures. Suchtransmission timing structures may define a timing grid, e.g., withsymbol time intervals within individual structures representing thesmallest timing units. Such a timing grid may for example be defined byslots or subframes (wherein in some cases, subframes may be consideredspecific variants of slots). A transmission timing structure may have aduration (length in time) determined based on the durations of itssymbols, possibly in addition to cyclic prefix/es used. The symbols of atransmission timing structure may have the same duration, or may in somevariants have different duration. The number of symbols in atransmission timing structure may be predefined and/or configured orconfigurable, and/or be dependent on numerology. The timing of amini-slot may generally be configured or configurable, in particular bythe network and/or a network node. The timing may be configurable tostart and/or end at any symbol of the transmission timing structure, inparticular one or more slots.

A transmission quality parameter may in general correspond to the numberR of retransmissions and/or number T of total transmissions, and/orcoding (e.g., number of coding bits, e.g. for error detection codingand/or error correction coding like FEC coding) and/or code rate and/orBLER and/or BER requirements and/or transmission power level (e.g.,minimum level and/or target level and/or base power level PO and/ortransmission power control command, TPC, step size) and/or signalquality, e.g. SNR and/or SIR and/or SINR and/or power density and/orenergy density.

A buffer state report (or buffer status report, BSR) may compriseinformation representing the presence and/or size of data to betransmitted (e.g., available in one or more buffers, for exampleprovided by higher layers). The size may be indicated explicitly, and/orindexed to range/s of sizes, and/or may pertain to one or more differentchannel/s and/or acknowledgement processes and/or higher layers and/orchannel groups/s, e.g, one or more logical channel/s and/or transportchannel/s and/or groups thereof: The structure of a BSR may bepredefined and/or configurable of configured, e.g. to override and/oramend a predefined structure, for example with higher layer signaling,e.g. RRC signaling. There may be different forms of BSR with differentlevels of resolution and/or information, e.g. a more detailed long BSRand a less detailed short BSR. A short BSR may concatenate and/orcombine information of a long BSR, e.g. providing sums for dataavailable for one or more channels and/or or channels groups and/orbuffers, which might be represented individually in a long BSR; and/ormay index a less-detailed range scheme for data available or buffered. ABSR may be used in lieu of a scheduling request, e.g. by a network nodescheduling or allocating (uplink) resources for the transmitting radionode like a wireless device or UE or IAB node.

There is generally considered a program product comprising instructionsadapted for causing processing and/or control circuitry to carry outand/or control any method described herein, in particular when executedon the processing and/or control circuitry. Also, there is considered acarrier medium arrangement carrying and/or storing a program product asdescribed herein.

A carrier medium arrangement may comprise one or more carrier media.Generally, a carrier medium may be accessible and/or readable and/orreceivable by processing or control circuitry. Storing data and/or aprogram product and/or code may be seen as part of carrying data and/ora program product and/or code. A carrier medium generally may comprise aguiding/transporting medium and/or a storage medium. Aguiding/transporting medium may be adapted to carry and/or carry and/orstore signals, in particular electromagnetic signals and/or electricalsignals and/or magnetic signals and/or optical signals. A carriermedium, in particular a guiding/transporting medium, may be adapted toguide such signals to carry them. A carrier medium, in particular aguiding/transporting medium, may comprise the electromagnetic field,e.g. radio waves or microwaves, and/or optically transmissive material,e.g. glass fiber, and/or cable. A storage medium may comprise at leastone of a memory, which may be volatile or non-volatile, a buffer, acache, an optical disc, magnetic memory, flash memory, etc.

A system comprising one or more radio nodes as described herein, inparticular a network node and a user equipment, is described. The systemmay be a wireless communication system, and/or provide and/or representa radio access network.

Moreover, there may be generally considered a method of operating aninformation system, the method comprising providing information.Alternatively, or additionally, an information system adapted forproviding information may be considered. Providing information maycomprise providing information for, and/or to, a target system, whichmay comprise and/or be implemented as radio access network and/or aradio node, in particular a network node or user equipment or terminal.Providing information may comprise transferring and/or streaming and/orsending and/or passing on the information, and/or offering theinformation for such and/or for download, and/or triggering suchproviding, e.g. by triggering a different system or node to streamand/or transfer and/or send and/or pass on the information. Theinformation system may comprise, and/or be connected or connectable to,a target, for example via one or more intermediate systems, e.g. a corenetwork and/or internet and/or private or local network. Information maybe provided utilising and/or via such intermediate system/s. Providinginformation may be for radio transmission and/or for transmission via anair interface and/or utilising a RAN or radio node as described herein.Connecting the information system to a target, and/or providinginformation, may be based on a target indication, and/or adaptive to atarget indication. A target indication may indicate the target, and/orone or more parameters of transmission pertaining to the target and/orthe paths or connections over which the information is provided to thetarget. Such parameter/s may in particular pertain to the air interfaceand/or radio access network and/or radio node and/or network node.Example parameters may indicate for example type and/or nature of thetarget, and/or transmission capacity (e.g., data rate) and/or latencyand/or reliability and/or cost, respectively one or more estimatesthereof. The target indication may be provided by the target, ordetermined by the information system, e.g. based on information receivedfrom the target and/or historical information, and/or be provided by auser, for example a user operating the target or a device incommunication with the target, e.g. via the RAN and/or air interface.For example, a user may indicate on a user equipment communicating withthe information system that information is to be provided via a RAN,e.g. by selecting from a selection provided by the information system,for example on a user application or user interface, which may be a webinterface. An information system may comprise one or more informationnodes. An information node may generally comprise processing circuitryand/or communication circuitry. In particular, an information systemand/or an information node may be implemented as a computer and/or acomputer arrangement, e.g. a host computer or host computer arrangementand/or server or server arrangement. In some variants, an interactionserver (e.g., web server) of the information system may provide a userinterface, and based on user input may trigger transmitting and/orstreaming information provision to the user (and/or the target) fromanother server, which may be connected or connectable to the interactionserver and/or be part of the information system or be connected orconnectable thereto. The information may be any kind of data, inparticular data intended for a user of for use at a terminal, e.g. videodata and/or audio data and/or location data and/or interactive dataand/or game-related data and/or environmental data and/or technical dataand/or traffic data and/or vehicular data and/or circumstantial dataand/or operational data. The information provided by the informationsystem may be mapped to, and/or mappable to, and/or be intended formapping to, communication or data signaling and/or one or more datachannels as described herein (which may be signaling or channel/s of anair interface and/or used within a RAN and/or for radio transmission).It may be considered that the information is formatted based on thetarget indication and/or target, e.g. regarding data amount and/or datarate and/or data structure and/or timing, which in particular may bepertaining to a mapping to communication or data signaling and/or a datachannel. Mapping information to data signaling and/or data channel/s maybe considered to refer to using the signaling/channel/s to carry thedata, e.g. on higher layers of communication, with thesignaling/channel/s underlying the transmission. A target indicationgenerally may comprise different components, which may have differentsources, and/or which may indicate different characteristics of thetarget and/or communication path/s thereto. A format of information maybe specifically selected, e.g. from a set of different formats, forinformation to be transmitted on an air interface and/or by a RAN asdescribed herein. This may be particularly pertinent since an airinterface may be limited in terms of capacity and/or of predictability,and/or potentially be cost sensitive. The format may be selected to beadapted to the transmission indication, which may in particular indicatethat a RAN or radio node as described herein is in the path (which maybe the indicated and/or planned and/or expected path) of informationbetween the target and the information system. A (communication) path ofinformation may represent the interface/s (e.g., air and/or cableinterfaces) and/or the intermediate system/s (if any), between theinformation system and/or the node providing or transferring theinformation, and the target, over which the information is, or is to be,passed on. A path may be (at least partly) undetermined when a targetindication is provided, and/or the information is provided/transferredby the information system, e.g. if an internet is involved, which maycomprise multiple, dynamically chosen paths. Information and/or a formatused for information may be packet-based, and/or be mapped, and/or bemappable and/or be intended for mapping, to packets. Alternatively, oradditionally, there may be considered a method for operating a targetdevice comprising providing a target indicating to an informationsystem. More alternatively, or additionally, a target device may beconsidered, the target device being adapted for providing a targetindication to an information system. In another approach, there may beconsidered a target indication tool adapted for, and/or comprising anindication module for, providing a target indication to an informationsystem. The target device may generally be a target as described above.A target indication tool may comprise, and/or be implemented as,software and/or application or app, and/or web interface or userinterface, and/or may comprise one or more modules for implementingactions performed and/or controlled by the tool. The tool and/or targetdevice may be adapted for, and/or the method may comprise, receiving auser input, based on which a target indicating may be determined and/orprovided. Alternatively, or additionally, the tool and/or target devicemay be adapted for, and/or the method may comprise, receivinginformation and/or communication signaling carrying information, and/oroperating on, and/or presenting (e.g., on a screen and/or as audio or asother form of indication), information. The information may be based onreceived information and/or communication signaling carryinginformation. Presenting information may comprise processing receivedinformation, e.g. decoding and/or transforming, in particular betweendifferent formats, and/or for hardware used for presenting. Operating oninformation may be independent of or without presenting, and/or proceedor succeed presenting, and/or may be without user interaction or evenuser reception, for example for automatic processes, or target deviceswithout (e.g., regular) user interaction like MTC devices, of forautomotive or transport or industrial use. The information orcommunication signaling may be expected and/or received based on thetarget indication. Presenting and/or operating on information maygenerally comprise one or more processing steps, in particular decodingand/or executing and/or interpreting and/or transforming information.Operating on information may generally comprise relaying and/ortransmitting the information, e.g. on an air interface, which mayinclude mapping the information onto signaling (such mapping maygenerally pertain to one or more layers, e.g. one or more layers of anair interface, e.g. RLC (Radio Link Control) layer and/or MAC layerand/or physical layer/s). The information may be imprinted (or mapped)on communication signaling based on the target indication, which maymake it particularly suitable for use in a RAN (e.g., for a targetdevice like a network node or in particular a UE or terminal). The toolmay generally be adapted for use on a target device, like a UE orterminal. Generally, the tool may provide multiple functionalities, e.g.for providing and/or selecting the target indication, and/or presenting,e.g. video and/or audio, and/or operating on and/or storing receivedinformation. Providing a target indication may comprise transmitting ortransferring the indication as signaling, and/or carried on signaling,in a RAN, for example if the target device is a UE, or the tool for aUE. It should be noted that such provided information may be transferredto the information system via one or more additionally communicationinterfaces and/or paths and/or connections. The target indication may bea higher-layer indication and/or the information provided by theinformation system may be higher-layer information, e.g. applicationlayer or user-layer, in particular above radio layers like transportlayer and physical layer. The target indication may be mapped onphysical layer radio signaling, e.g. related to or on the user-plane,and/or the information may be mapped on physical layer radiocommunication signaling, e.g. related to or on the user-plane (inparticular, in reverse communication directions). The describedapproaches allow a target indication to be provided, facilitatinginformation to be provided in a specific format particularly suitableand/or adapted to efficiently use an air interface. A user input may forexample represent a selection from a plurality of possible transmissionmodes or formats, and/or paths, e.g. in terms of data rate and/orpackaging and/or size of information to be provided by the informationsystem.

In general, a numerology and/or subcarrier spacing may indicate thebandwidth (in frequency domain) of a subcarrier of a carrier, and/or thenumber of subcarriers in a carrier and/or the numbering of thesubcarriers in a carrier, and/or the symbol time length. Differentnumerologies may in particular be different in the bandwidth of asubcarrier. In some variants, all the subcarriers in a carrier have thesame bandwidth associated to them. The numerology and/or subcarrierspacing may be different between carriers in particular regarding thesubcarrier bandwidth. A symbol time length, and/or a time length of atiming structure pertaining to a carrier may be dependent on the carrierfrequency, and/or the subcarrier spacing and/or the numerology. Inparticular, different numerologies may have different symbol timelengths, even on the same carrier.

Signaling may generally comprise one or more (e.g., modulation) symbolsand/or signals and/or messages. A signal may comprise or represent oneor more bits. An indication may represent signaling, and/or beimplemented as a signal, or as a plurality of signals. One or moresignals may be included in and/or represented by a message. Signaling,in particular control signaling, may comprise a plurality of signalsand/or messages, which may be transmitted on different carriers and/orbe associated to different signaling processes, e.g. representing and/orpertaining to one or more such processes and/or correspondinginformation. An indication may comprise signaling, and/or a plurality ofsignals and/or messages and/or may be comprised therein, which may betransmitted on different carriers and/or be associated to differentacknowledgement signaling processes, e.g. representing and/or pertainingto one or more such processes. Signaling associated to a channel may betransmitted such that represents signaling and/or information for thatchannel, and/or that the signaling is interpreted by the transmitterand/or receiver to belong to that channel. Such signaling may generallycomply with transmission parameters and/or format/s for the channel.

An antenna arrangement may comprise one or more antenna elements(radiating elements), which may be combined in antenna arrays. Anantenna array or subarray may comprise one antenna element, or aplurality of antenna elements, which may be arranged e.g. twodimensionally (for example, a panel) or three dimensionally. It may beconsidered that each antenna array or subarray or element is separatelycontrollable, respectively that different antenna arrays arecontrollable separately from each other. A single antennaelement/radiator may be considered the smallest example of a subarray.Examples of antenna arrays comprise one or more multi-antenna panels orone or more individually controllable antenna elements. An antennaarrangement may comprise a plurality of antenna arrays. It may beconsidered that an antenna arrangement is associated to a (specificand/or single) radio node, e.g. a configuring or informing or schedulingradio node, e.g. to be controlled or controllable by the radio node. Anantenna arrangement associated to a UE or terminal may be smaller (e.g.,in size and/or number of antenna elements or arrays) than the antennaarrangement associated to a network node. Antenna elements of an antennaarrangement may be configurable for different arrays, e.g. to change thebeamforming characteristics. In particular, antenna arrays may be formedby combining one or more independently or separately controllableantenna elements or subarrays. The beams may be provided by analogbeamforming, or in some variants by digital beamforming, or by hybridbeamforming combing analog and digital beamforming. The informing radionodes may be configured with the manner of beam transmission, e.g. bytransmitting a corresponding indicator or indication, for example asbeam identify indication. However, there may be considered cases inwhich the informing radio node/s are not configured with suchinformation, and/or operate transparently, not knowing the way ofbeamforming used. An antenna arrangement may be considered separatelycontrollable in regard to the phase and/or amplitude/power and/or gainof a signal feed to it for transmission, and/or separately controllableantenna arrangements may comprise an independent or separate transmitand/or receive unit and/or ADC (Analog-Digital-Converter, alternativelyan ADC chain) or DCA (Digital-to-Analog Converter, alternatively a DCAchain) to convert digital control information into an analog antennafeed for the whole antenna arrangement (the ADC/DCA may be consideredpart of, and/or connected or connectable to, antenna circuitry) or viceversa. A scenario in which an ADC or DCA is controlled directly forbeamforming may be considered an analog beamforming scenario; suchcontrolling may be performed after encoding/decoding and 7 or aftermodulation symbols have been mapped to resource elements. This may be onthe level of antenna arrangements using the same ADC/DCA, e.g. oneantenna element or a group of antenna elements associated to the sameADC/DCA. Digital beamforming may correspond to a scenario in whichprocessing for beamforming is provided before feeding signaling to theADC/DCA, e.g. by using one or more precoder/s and/or by precodinginformation, for example before and/or when mapping modulation symbolsto resource elements. Such a precoder for beamforming may provideweights, e.g. for amplitude and/or phase, and/or may be based on a(precoder) codebook, e.g. selected from a codebook. A precoder maypertain to one beam or more beams, e.g. defining the beam or beams. Thecodebook may be configured or configurable, and/or be predefined. DFTbeamforming may be considered a form of digital beamforming, wherein aDFT procedure is used to form one or more beams. Hybrid forms ofbeamforming may be considered.

A beam may be defined by a spatial and/or angular and/or spatial angulardistribution of radiation and/or a spatial angle (also referred to assolid angle) or spatial (solid) angle distribution into which radiationis transmitted (for transmission beamforming) or from which it isreceived (for reception beamforming). Reception beamforming may compriseonly accepting signals coming in from a reception beam (e.g., usinganalog beamforming to not receive outside reception beam/s), and/orsorting out signals that do not come in in a reception beam, e.g. indigital postprocessing, e.g. digital beamforming. A beam may have asolid angle equal to or smaller than 4*pi sr (4*pi correspond to a beamcovering all directions), in particular smaller than 2*pi, or pi, orpi/2, or pi/4 or pi/8 or pi/16. In particular for high frequencies,smaller beams may be used. Different beams may have different directionsand/or sizes (e.g., solid angle and/or reach). A beam may have a maindirection, which may be defined by a main lobe (e.g., center of the mainlobe, e.g. pertaining to signal strength and/or solid angle, which maybe averaged and/or weighted to determine the direction), and may haveone or more sidelobes. A lobe may generally be defined to have acontinuous or contiguous distribution of energy and/or power transmittedand/or received, e.g. bounded by one or more contiguous or contiguousregions of zero energy (or practically zero energy). A main lobe maycomprise the lobe with the largest signal strength and/or energy and/orpower content. However, sidelobes usually appear due to limitations ofbeamforming, some of which may carry signals with significant strength,and may cause multi-path effects. A sidelobe may generally have adifferent direction than a main lobe and/or other side lobes, however,due to reflections a sidelobe still may contribute to transmitted and/orreceived energy or power. A beam may be swept and/or switched over time,e.g., such that its (main) direction is changed, but its shape(angular/solid angle distribution) around the main direction is notchanged, e.g. from the transmitters views for a transmission beam, orthe receiver's view for a reception beam, respectively. Sweeping maycorrespond to continuous or near continuous change of main direction(e.g., such that after each change, the main lobe from before the changecovers at least partly the main lobe after the change, e.g. at least to50 or 75 or 90 percent). Switching may correspond to switching directionnon-continuously, e.g. such that after each change, the main lobe frombefore the change does not cover the main lobe after the change, e.g. atmost to 50 or 25 or 10 percent.

Signal strength may be a representation of signal power and/or signalenergy, e.g. as seen from a transmitting node or a receiving node. Abeam with larger strength at transmission (e.g., according to thebeamforming used) than another beam does may not necessarily have largerstrength at the receiver, and vice versa, for example due tointerference and/or obstruction and/or dispersion and/or absorptionand/or reflection and/or attrition or other effects influencing a beamor the signaling it carries. Signal quality may in general be arepresentation of how well a signal may be received over noise and/orinterference. A beam with better signal quality than another beam doesnot necessarily have a larger beam strength than the other beam. Signalquality may be represented for example by SIR, SNR, SINR, BER, BLER,Energy per resource element over noise/interference or anothercorresponding quality measure. Signal quality and/or signal strength maypertain to, and/or may be measured with respect to, a beam, and/orspecific signaling carried by the beam, e.g. reference signaling and/ora specific channel, e.g. a data channel or control channel. Signalstrength may be represented by received signal strength, and/or relativesignal strength, e.g. in comparison to a reference signal (strength).

Uplink or sidelink signaling may be OFDMA (Orthogonal Frequency DivisionMultiple Access) or SC-FDMA (Single Carrier Frequency Division MultipleAccess) signaling. Downlink signaling may in particular be OFDMAsignaling. However, signaling is not limited thereto (Filter-Bank basedsignaling and/or Single-Carrier based signaling, e.g. SC-FDE signaling,may be considered alternatives).

A radio node may generally be considered a device or node adapted forwireless and/or radio (and/or millimeter wave) frequency communication,and/or for communication utilising an air interface, e.g. according to acommunication standard.

A radio node may be a network node, or a user equipment or terminal. Anetwork node may be any radio node of a wireless communication network,e.g. a base station and/or gNodeB (gNB) and/or eNodeB (eNB) and/or relaynode and/or micro/nano/pico/femto node and/or transmission point (TP)and/or access point (AP) and/or other node, in particular for a RAN orother wireless communication network as described herein.

The terms user equipment (UE) and terminal may be considered to beinterchangeable in the context of this disclosure. A wireless device,user equipment or terminal may represent an end device for communicationutilising the wireless communication network, and/or be implemented as auser equipment according to a standard. Examples of user equipments maycomprise a phone like a smartphone, a personal communication device, amobile phone or terminal, a computer, in particular laptop, a sensor ormachine with radio capability (and/or adapted for the air interface), inparticular for MTC (Machine-Type-Communication, sometimes also referredto M2M, Machine-To-Machine), or a vehicle adapted for wirelesscommunication. A user equipment or terminal may be mobile or stationary.A wireless device generally may comprise, and/or be implemented as,processing circuitry and/or radio circuitry, which may comprise one ormore chips or sets of chips. The circuitry and/or circuitries may bepackaged, e.g. in a chip housing, and/or may have one or more physicalinterfaces to interact with other circuitry and/or for power supply.Such a wireless device may be intended for use in a user equipment orterminal.

A radio node may generally comprise processing circuitry and/or radiocircuitry. A radio node, in particular a network node, may in some casescomprise cable circuitry and/or communication circuitry, with which itmay be connected or connectable to another radio node and/or a corenetwork.

Circuitry may comprise integrated circuitry. Processing circuitry maycomprise one or more processors and/or controllers (e.g.,microcontrollers), and/or ASICs (Application Specific IntegratedCircuitry) and/or FPGAs (Field Programmable Gate Array), or similar. Itmay be considered that processing circuitry comprises, and/or is(operatively) connected or connectable to one or more memories or memoryarrangements. A memory arrangement may comprise one or more memories. Amemory may be adapted to store digital information. Examples formemories comprise volatile and non-volatile memory, and/or Random AccessMemory (RAM), and/or Read-Only-Memory (ROM), and/or magnetic and/oroptical memory, and/or flash memory, and/or hard disk memory, and/orEPROM or EEPROM (Erasable Programmable ROM or Electrically ErasableProgrammable ROM).

Radio circuitry may comprise one or more transmitters and/or receiversand/or transceivers (a transceiver may operate or be operable astransmitter and receiver, and/or may comprise joint or separatedcircuitry for receiving and transmitting, e.g. in one package orhousing), and/or may comprise one or more amplifiers and/or oscillatorsand/or filters, and/or may comprise, and/or be connected or connectableto antenna circuitry and/or one or more antennas and/or antenna arrays.An antenna array may comprise one or more antennas, which may bearranged in a dimensional array, e.g. 2D or 3D array, and/or antennapanels. A remote radio head (RRH) may be considered as an example of anantenna array. However, in some variants, an RRH may be also beimplemented as a network node, depending on the kind of circuitry and/orfunctionality implemented therein.

Communication circuitry may comprise radio circuitry and/or cablecircuitry. Communication circuitry generally may comprise one or moreinterfaces, which may be air interface/s and/or cable interface/s and/oroptical interface/s, e.g. laser-based. Interface/s may be in particularpacket-based. Cable circuitry and/or a cable interfaces may comprise,and/or be connected or connectable to, one or more cables (e.g., opticalfiber-based and/or wire-based), which may be directly or indirectly(e.g., via one or more intermediate systems and/or interfaces) beconnected or connectable to a target, e.g. controlled by communicationcircuitry and/or processing circuitry.

Any one or all of the modules disclosed herein may be implemented insoftware and/or firmware and/or hardware. Different modules may beassociated to different components of a radio node, e.g. differentcircuitries or different parts of a circuitry. It may be considered thata module is distributed over different components and/or circuitries. Aprogram product as described herein may comprise the modules related toa device on which the program product is intended (e.g., a userequipment or network node) to be executed (the execution may beperformed on, and/or controlled by the associated circuitry).

A wireless communication network may be or comprise a radio accessnetwork and/or a backhaul network (e.g. a relay or backhaul network oran IAB network), and/or a Radio Access Network (RAN) in particularaccording to a communication standard. A communication standard may inparticular a standard according to 3GPP and/or 5G, e.g. according to NRor LTE, in particular LTE Evolution.

A wireless communication network may be and/or comprise a Radio AccessNetwork (RAN), which may be and/or comprise any kind of cellular and/orwireless radio network, which may be connected or connectable to a corenetwork. The approaches described herein are particularly suitable for a5G network, e.g. LTE Evolution and/or NR (New Radio), respectivelysuccessors thereof. A RAN may comprise one or more network nodes, and/orone or more terminals, and/or one or more radio nodes. A network nodemay in particular be a radio node adapted for radio and/or wirelessand/or cellular communication with one or more terminals. A terminal maybe any device adapted for radio and/or wireless and/or cellularcommunication with or within a RAN, e.g. a user equipment (UE) or mobilephone or smartphone or computing device or vehicular communicationdevice or device for machine-type-communication (MTC), etc. A terminalmay be mobile, or in some cases stationary. A RAN or a wirelesscommunication network may comprise at least one network node and a UE,or at least two radio nodes. There may be generally considered awireless communication network or system, e.g. a RAN or RAN system,comprising at least one radio node, and/or at least one network node andat least one terminal.

Transmitting in downlink may pertain to transmission from the network ornetwork node to the terminal. Transmitting in uplink may pertain totransmission from the terminal to the network or network node.Transmitting in sidelink may pertain to (direct) transmission from oneterminal to another. Uplink, downlink and sidelink (e.g., sidelinktransmission and reception) may be considered communication directions.In some variants, uplink and downlink may also be used to describedwireless communication between network nodes, e.g. for wireless backhauland/or relay communication and/or (wireless) network communication forexample between base stations or similar network nodes, in particularcommunication terminating at such. It may be considered that backhauland/or relay communication and/or network communication is implementedas a form of sidelink or uplink communication or similar thereto.

Control information or a control information message or correspondingsignaling (control signaling) may be transmitted on a control channel,e.g. a physical control channel, which may be a downlink channel or (ora sidelink channel in some cases, e.g. one UE scheduling another UE).For example, control information/allocation information may be signaledby a network node on PDCCH (Physical Downlink Control Channel) and/or aPDSCH (Physical Downlink Shared Channel) and/or a HARQ-specific channel.Acknowledgement signaling, e.g. as a form of control information orsignaling like uplink control information/signaling, may be transmittedby a terminal on a PUCCH (Physical Uplink Control Channel) and/or PUSCH(Physical Uplink Shared Channel) and/or a HARQ-specific channel.Multiple channels may apply for multi-component/multi-carrier indicationor signaling.

Transmitting acknowledgement signaling may in general be based on and/orin response to subject transmission, and/or to control signalingscheduling subject transmission. Such control signaling and/or subjectsignaling may be transmitted by a signaling radio node (which may be anetwork node, and/or a node associated to it, e.g. in a dualconnectivity scenario. Subject transmission and/or subject signaling maybe transmission or signaling to which ACK/NACK or acknowledgementinformation pertains, e.g. indicating correct or incorrect receptionand/or decoding of the subject transmission or signaling. Subjectsignaling or transmission may in particular comprise and/or berepresented by data signaling, e.g. on a PDSCH or PSSCH, or some formsof control signaling, e.g. on a PDCCH or PSSCH, for example for specificformats.

A signaling characteristic may be based on a type or format of ascheduling grant and/or scheduling assignment, and/or type ofallocation, and/or timing of acknowledgement signaling and/or thescheduling grant and/or scheduling assignment, and/or resourcesassociated to acknowledgement signaling and/or the scheduling grantand/or scheduling assignment. For example, if a specific format for ascheduling grant (scheduling or allocating the allocated resources) orscheduling assignment (scheduling the subject transmission foracknowledgement signaling) is used or detected, the first or secondcommunication resource may be used. Type of allocation may pertain todynamic allocation (e.g., using DCI/PDCCH) or semi-static allocation(e.g., for a configured grant). Timing of acknowledgement signaling maypertain to a slot and/or symbol/s the signaling is to be transmitted.Resources used for acknowledgement signaling may pertain to theallocated resources. Timing and/or resources associated to a schedulinggrant or assignment may represent a search space or CORESET (a set ofresources configured for reception of PDCCH transmissions) in which thegrant or assignment is received. Thus, which transmission resource to beused may be based on implicit conditions, requiring low signalingoverhead.

Scheduling may comprise indicating, e.g. with control signaling like DCIor SCI signaling and/or signaling on a control channel like PDCCH orPSCCH, one or more scheduling opportunities of a configuration intendedto carry data signaling or subject signaling. The configuration may berepresented or representable by, and/or correspond to, a table. Ascheduling assignment may for example point to an opportunity of thereception allocation configuration, e.g. indexing a table of schedulingopportunities. In some cases, a reception allocation configuration maycomprise 15 or 16 scheduling opportunities. The configuration may inparticular represent allocation in time. It may be considered that thereception allocation configuration pertains to data signaling, inparticular on a physical data channel like PDSCH or PSSCH. In general,the reception allocation configuration may pertain to downlinksignaling, or in some scenarios to sidelink signaling. Control signalingscheduling subject transmission like data signaling may point and/orindex and/or refer to and/or indicate a scheduling opportunity of thereception allocation configuration. It may be considered that thereception allocation configuration is configured or configurable withhigher-layer signaling, e.g. RRC or MAC layer signaling. The receptionallocation configuration may be applied and/or applicable and/or validfor a plurality of transmission timing intervals, e.g. such that foreach interval, one or more opportunities may be indicated or allocatedfor data signaling. These approaches allow efficient and flexiblescheduling, which may be semi-static, but may updated or reconfigured onuseful timescales in response to changes of operation conditions.

Control information, e.g., in a control information message, in thiscontext may in particular be implemented as and/or represented by ascheduling assignment, which may indicate subject transmission forfeedback (transmission of acknowledgement signaling), and/or reportingtiming and/or frequency resources and/or code resources. Reportingtiming may indicate a timing for scheduled acknowledgement signaling,e.g. slot and/or symbol and/or resource set. Control information may becarried by control signaling.

Subject transmissions may comprise one or more individual transmissions.Scheduling assignments may comprise one or more scheduling assignments.It should generally be noted that in a distributed system, subjecttransmissions, configuration and/or scheduling may be provided bydifferent nodes or devices or transmission points. Different subjecttransmissions may be on the same carrier or different carriers (e.g., ina carrier aggregation), and/or same or different bandwidth parts, and/oron the same or different layers or beams, e.g. in a MIMO scenario,and/or to same or different ports. Generally, subject transmissions maypertain to different HARQ or ARQ processes (or different sub-processes,e.g. in MIMO with different beams/layers associated to the same processidentifier, but different sub-process-identifiers like swap bits). Ascheduling assignment and/or a HARQ codebook may indicate a target HARQstructure. A target HARQ structure may for example indicate an intendedHARQ response to a subject transmission, e.g. the number of bits and/orwhether to provide code block group level response or not. However, itshould be noted that the actual structure used may differ from thetarget structure, e.g. due to the total size of target structures for asubpattern being larger than the predetermined size.

Transmitting acknowledgement signaling, also referred to as transmittingacknowledgement information or feedback information or simply as ARQ orHARQ feedback or feedback or reporting feedback, may comprise, and/or bebased on determining correct or incorrect reception of subjecttransmission/s, e.g. based on error coding and/or based on schedulingassignment/s scheduling the subject transmissions. Transmittingacknowledgement information may be based on, and/or comprise, astructure for acknowledgement information to transmit, e.g. thestructure of one or more subpatterns, e.g. based on which subjecttransmission is scheduled for an associated subdivision. Transmittingacknowledgement information may comprise transmitting correspondingsignaling, e.g. at one instance and/or in one message and/or onechannel, in particular a physical channel, which may be a controlchannel. In some cases, the channel may be a shared channel or datachannel, e.g. utilising rate-matching of the acknowledgment information.The acknowledgement information may generally pertain to a plurality ofsubject transmissions, which may be on different channels and/orcarriers, and/or may comprise data signaling and/or control signaling.The acknowledgment information may be based on a codebook, which may bebased on one or more size indications and/or assignment indications(representing HARQ structures), which may be received with a pluralityof control signalings and/or control messages, e.g. in the same ordifferent transmission timing structures, and/or in the same ordifferent (target) sets of resources. Transmitting acknowledgementinformation may comprise determining the codebook, e.g. based on controlinformation in one or more control information messages and/or aconfiguration. A codebook may pertain to transmitting acknowledgementinformation at a single and/or specific instant, e.g. a single PUCCH orPUSCH transmission, and/or in one message or with jointly encoded and/ormodulated acknowledgement information. Generally, acknowledgmentinformation may be transmitted together with other control information,e.g. a scheduling request and/or measurement information.

Acknowledgement signaling may in some cases comprise, next toacknowledgement information, other information, e.g. controlinformation, in particular, uplink or sidelink control information, likea scheduling request and/or measurement information, or similar, and/orerror detection and/or correction information, respectively associatedbits. The payload size of acknowledgement signaling may represent thenumber of bits of acknowledgement information, and/or in some cases thetotal number of bits carried by the acknowledgement signaling, and/orthe number of resource elements needed. Acknowledgement signaling and/orinformation may pertain to ARQ and/or HARQ processes; an ARQ process mayprovide ACK/NACK (and perhaps additional feedback) feedback, anddecoding may be performed on each (re-)transmission separately, withoutsoft-buffering/soft-combining intermediate data, whereas HARQ maycomprise soft-buffering/soft-combining of intermediate data of decodingfor one or more (re-)transmissions.

Subject transmission may be data signaling or control signaling. Thetransmission may be on a shared or dedicated channel. Data signaling maybe on a data channel, for example on a PDSCH or PSSCH, or on a dedicateddata channel, e.g. for low latency and/or high reliability, e.g. a URLLCchannel. Control signaling may be on a control channel, for example on acommon control channel or a PDCCH or PSCCH, and/or comprise one or moreDCI messages or SCI messages. In some cases, the subject transmissionmay comprise, or represent, reference signaling. For example, it maycomprise DM-RS and/or pilot signaling and/or discovery signaling and/orsounding signaling and/or phase tracking signaling and/or cell-specificreference signaling and/or user-specific signaling, in particularCSI-RS. A subject transmission may pertain to one scheduling assignmentand/or one acknowledgement signaling process (e.g., according toidentifier or subidentifier), and/or one subdivision. In some cases, asubject transmission may cross the borders of subdivisions in time, e.g.due to being scheduled to start in one subdivision and extending intoanother, or even crossing over more than one subdivision. In this case,it may be considered that the subject transmission is associated to thesubdivision it ends in.

It may be considered that transmitting acknowledgement information, inparticular of acknowledgement information, is based on determiningwhether the subject transmission/s has or have been received correctly,e.g. based on error coding and/or reception quality. Reception qualitymay for example be based on a determined signal quality. Acknowledgementinformation may generally be transmitted to a signaling radio nodeand/or node arrangement and/or to a network and/or network node.

Acknowledgement information, or bit/s of a subpattern structure of suchinformation (e.g., an acknowledgement information structure, mayrepresent and/or comprise one or more bits, in particular a pattern ofbits. Multiple bits pertaining to a data structure or substructure ormessage like a control message may be considered a subpattern. Thestructure or arrangement of acknowledgement information may indicate theorder, and/or meaning, and/or mapping, and/or pattern of bits (orsubpatterns of bits) of the information. The structure or mapping may inparticular indicate one or more data block structures, e.g. code blocksand/or code block groups and/or transport blocks and/or messages, e.g.command messages, the acknowledgement information pertains to, and/orwhich bits or subpattern of bits are associated to which data blockstructure. In some cases, the mapping may pertain to one or moreacknowledgement signaling processes, e.g. processes with differentidentifiers, and/or one or more different data streams. Theconfiguration or structure or codebook may indicate to which process/esand/or data stream/s the information pertains. Generally, theacknowledgement information may comprise one or more subpatterns, eachof which may pertain to a data block structure, e.g. a code block orcode block group or transport block. A subpattern may be arranged toindicate acknowledgement or non-acknowledgement, or anotherretransmission state like non-scheduling or non-reception, of theassociated data block structure. It may be considered that a subpatterncomprises one bit, or in some cases more than one bit. It should benoted that acknowledgement information may be subjected to significantprocessing before being transmitted with acknowledgement signaling.Different configurations may indicate different sizes and/or mappingand/or structures and/or pattern.

An acknowledgment signaling process (providing acknowledgmentinformation) may be a HARQ process, and/or be identified by a processidentifier, e.g. a HARQ process identifier or subidentifier.Acknowledgement signaling and/or associated acknowledgement informationmay be referred to as feedback or acknowledgement feedback. It should benoted that data blocks or structures to which subpatterns may pertainmay be intended to carry data (e.g., information and/or systemic and/orcoding bits). However, depending on transmission conditions, such datamay be received or not received (or not received correctly), which maybe indicated correspondingly in the feedback. In some cases, asubpattern of acknowledgement signaling may comprise padding bits, e.g.if the acknowledgement information for a data block requires fewer bitsthan indicated as size of the subpattern. Such may for example happen ifthe size is indicated by a unit size larger than required for thefeedback.

Acknowledgment information may generally indicate at least ACK or NACK,e.g. pertaining to an acknowledgment signaling process, or an element ofa data block structure like a data block, subblock group or subblock, ora message, in particular a control message. Generally, to anacknowledgment signaling process there may be associated one specificsubpattern and/or a data block structure, for which acknowledgmentinformation may be provided. Acknowledgement information may comprise aplurality of pieces of information, represented in a plurality of ARQand/or HARQ structures.

An acknowledgment signaling process may determine correct or incorrectreception, and/or corresponding acknowledgement information, of a datablock like a transport block, and/or substructures thereof, based oncoding bits associated to the data block, and/or based on coding bitsassociated to one or more data block and/or subblocks and/or subblockgroup/s. Acknowledgement information (determined by an acknowledgementsignaling process) may pertain to the data block as a whole, and/or toone or more subblocks or subblock groups. A code block may be consideredan example of a subblock, whereas a code block group may be consideredan example of a subblock group. Accordingly, the associated subpatternmay comprise one or more bits indicating reception status or feedback ofthe data block, and/or one or more bits indicating reception status orfeedback of one or more subblocks or subblock groups. Each subpattern orbit of the subpattern may be associated and/or mapped to a specific datablock or subblock or subblock group. In some variants, correct receptionfor a data block may be indicated if all subblocks or subblock groupsare correctly identified. In such a case, the subpattern may representacknowledgement information for the data block as a whole, reducingoverhead in comparison to provide acknowledgement information for thesubblocks or subblock groups. The smallest structure (e.g.subblock/subblock group/data block) the subpattern providesacknowledgement information for and/or is associated to may beconsidered its (highest) resolution. In some variants, a subpattern mayprovide acknowledgment information regarding several elements of a datablock structure and/or at different resolution, e.g. to allow morespecific error detection. For example, even if a subpattern indicatesacknowledgment signaling pertaining to a data block as a whole, in somevariants higher resolution (e.g., subblock or subblock group resolution)may be provided by the subpattern. A subpattern may generally compriseone or more bits indicating ACK/NACK for a data block, and/or one ormore bits for indicating ACK/NACK for a subblock or subblock group, orfor more than one subblock or subblock group.

A subblock and/or subblock group may comprise information bits(representing the data to be transmitted, e.g. user data and/ordownlink/sidelink data or uplink data). It may be considered that a datablock and/or subblock and/or subblock group also comprises error one ormore error detection bits, which may pertain to, and/or be determinedbased on, the information bits (for a subblock group, the errordetection bit/s may be determined based on the information bits and/orerror detection bits and/or error correction bits of the subblock/s ofthe subblock group). A data block or substructure like subblock orsubblock group may comprise error correction bits, which may inparticular be determined based on the information bits and errordetection bits of the block or substructure, e.g. utilising an errorcorrection coding scheme, in particular for forward error correction(FEC), e.g. LDPC or polar coding and/or turbo coding. Generally, theerror correction coding of a data block structure (and/or associatedbits) may cover and/or pertain to information bits and error detectionbits of the structure. A subblock group may represent a combination ofone or more code blocks, respectively the corresponding bits. A datablock may represent a code block or code block group, or a combinationof more than one code block groups. A transport block may be split up incode blocks and/or code block groups, for example based on the bit sizeof the information bits of a higher layer data structure provided forerror coding and/or size requirements or preferences for error coding,in particular error correction coding. Such a higher layer datastructure is sometimes also referred to as transport block, which inthis context represents information bits without the error coding bitsdescribed herein, although higher layer error handling information maybe included, e.g. for an internet protocol like TCP. However, such errorhandling information represents information bits in the context of thisdisclosure, as the acknowledgement signaling procedures described treatit accordingly.

In some variants, a subblock like a code block may comprise errorcorrection bits, which may be determined based on the information bit/sand/or error detection bit/s of the subblock. An error correction codingscheme may be used for determining the error correction bits, e.g. basedon LDPC or polar coding or Reed-Mueller coding. In some cases, asubblock or code block may be considered to be defined as a block orpattern of bits comprising information bits, error detection bit/sdetermined based on the information bits, and error correction bit/sdetermined based on the information bits and/or error detection bit/s.It may be considered that in a subblock, e.g. code block, theinformation bits (and possibly the error correction bit/s) are protectedand/or covered by the error correction scheme or corresponding errorcorrection bit/s. A code block group may comprise one or more codeblocks. In some variants, no additional error detection bits and/orerror correction bits are applied, however, it may be considered toapply either or both. A transport block may comprise one or more codeblock groups. It may be considered that no additional error detectionbits and/or error correction bits are applied to a transport block,however, it may be considered to apply either or both. In some specificvariants, the code block group/s comprise no additional layers of errordetection or correction coding, and the transport block may compriseonly additional error detection coding bits, but no additional errorcorrection coding. This may particularly be true if the transport blocksize is larger than the code block size and/or the maximum size forerror correction coding. A subpattern of acknowledgement signaling (inparticular indicating ACK or NACK) may pertain to a code block, e.g.indicating whether the code block has been correctly received. It may beconsidered that a subpattern pertains to a subgroup like a code blockgroup or a data block like a transport block. In such cases, it mayindicate ACK, if all subblocks or code blocks of the group ordata/transport block are received correctly (e.g. based on a logical ANDoperation), and NACK or another state of non-correct reception if atleast one subblock or code block has not been correctly received. Itshould be noted that a code block may be considered to be correctlyreceived not only if it actually has been correctly received, but alsoif it can be correctly reconstructed based on soft-combining and/or theerror correction coding.

A subpattern/HARQ structure may pertain to one acknowledgement signalingprocess and/or one carrier like a component carrier and/or data blockstructure or data block. It may in particular be considered that one(e.g. specific and/or single) subpattern pertains, e.g. is mapped by thecodebook, to one (e.g., specific and/or single) acknowledgementsignaling process, e.g. a specific and/or single HARQ process. It may beconsidered that in the bit pattern, subpatterns are mapped toacknowledgement signaling processes and/or data blocks or data blockstructures on a one-to-one basis. In some variants, there may bemultiple subpatterns (and/or associated acknowledgment signalingprocesses) associated to the same component carrier, e.g. if multipledata streams transmitted on the carrier are subject to acknowledgementsignaling processes. A subpattern may comprise one or more bits, thenumber of which may be considered to represent its size or bit size.Different bit n-tupels (n being 1 or larger) of a subpattern may beassociated to different elements of a data block structure (e.g., datablock or subblock or subblock group), and/or represent differentresolutions. There may be considered variants in which only oneresolution is represented by a bit pattern, e.g. a data block. A bitn-tupel may represent acknowledgement information (also referred to afeedback), in particular ACK or NACK, and optionally, (if n>1), mayrepresent DTX/DRX or other reception states. ACK/NACK may be representedby one bit, or by more than one bit, e.g. to improve disambiguity of bitsequences representing ACK or NACK, and/or to improve transmissionreliability.

The acknowledgement information or feedback information may pertain to aplurality of different transmissions, which may be associated to and/orrepresented by data block structures, respectively the associated datablocks or data signaling. The data block structures, and/or thecorresponding blocks and/or signaling, may be scheduled for simultaneoustransmission, e.g. for the same transmission timing structure, inparticular within the same slot or subframe, and/or on the samesymbol/s. However, alternatives with scheduling for non-simultaneoustransmission may be considered. For example, the acknowledgmentinformation may pertain to data blocks scheduled for differenttransmission timing structures, e.g. different slots (or mini-slots, orslots and mini-slots) or similar, which may correspondingly be received(or not or wrongly received). Scheduling signaling may generallycomprise indicating resources, e.g. time and/or frequency resources, forexample for receiving or transmitting the scheduled signaling.

Signaling may generally be considered to represent an electromagneticwave structure (e.g., over a time interval and frequency interval),which is intended to convey information to at least one specific orgeneric (e.g., anyone who might pick up the signaling) target. A processof signaling may comprise transmitting the signaling. Transmittingsignaling, in particular control signaling or communication signaling,e.g. comprising or representing acknowledgement signaling and/orresource requesting information, may comprise encoding and/ormodulating. Encoding and/or modulating may comprise error detectioncoding and/or forward error correction encoding and/or scrambling.Receiving control signaling may comprise corresponding decoding and/ordemodulation. Error detection coding may comprise, and/or be based on,parity or checksum approaches, e.g. CRC (Cyclic Redundancy Check).Forward error correction coding may comprise and/or be based on forexample turbo coding and/or Reed-Muller coding, and/or polar codingand/or LDPC coding (Low Density Parity Check). The type of coding usedmay be based on the channel (e.g., physical channel) the coded signal isassociated to. A code rate may represent the ratio of the number ofinformation bits before encoding to the number of encoded bits afterencoding, considering that encoding adds coding bits for error detectioncoding and forward error correction. Coded bits may refer to informationbits (also called systematic bits) plus coding bits.

Communication signaling may comprise, and/or represent, and/or beimplemented as, data signaling, and/or user plane signaling.Communication signaling may be associated to a data channel, e.g. aphysical downlink channel or physical uplink channel or physicalsidelink channel, in particular a PDSCH (Physical Downlink SharedChannel) or PSSCH (Physical Sidelink Shared Channel). Generally, a datachannel may be a shared channel or a dedicated channel. Data signalingmay be signaling associated to and/or on a data channel.

An indication generally may explicitly and/or implicitly indicate theinformation it represents and/or indicates. Implicit indication may forexample be based on position and/or resource used for transmission.Explicit indication may for example be based on a parametrisation withone or more parameters, and/or one or more index or indices, and/or oneor more bit patterns representing the information. It may in particularbe considered that control signaling as described herein, based on theutilised resource sequence, implicitly indicates the control signalingtype.

A resource element may generally describe the smallest individuallyusable and/or encodable and/or decodable and/or modulatable and/ordemodulatable time-frequency resource, and/or may describe atime-frequency resource covering a symbol time length in time and asubcarrier in frequency. A signal may be allocatable and/or allocated toa resource element. A subcarrier may be a subband of a carrier, e.g. asdefined by a standard. A carrier may define a frequency and/or frequencyband for transmission and/or reception. In some variants, a signal(jointly encoded/modulated) may cover more than one resource elements. Aresource element may generally be as defined by a correspondingstandard, e.g. NR or LTE. As symbol time length and/or subcarrierspacing (and/or numerology) may be different between different symbolsand/or subcarriers, different resource elements may have differentextension (length/width) in time and/or frequency domain, in particularresource elements pertaining to different carriers.

A resource generally may represent a time-frequency and/or coderesource, on which signaling, e.g. according to a specific format, maybe communicated, for example transmitted and/or received, and/or beintended for transmission and/or reception.

A border symbol may generally represent a starting symbol or an endingsymbol for transmitting and/or receiving. A starting symbol may inparticular be a starting symbol of uplink or sidelink signaling, forexample control signaling or data signaling. Such signaling may be on adata channel or control channel, e.g. a physical channel, in particulara physical uplink shared channel (like PUSCH) or a sidelink data orshared channel, or a physical uplink control channel (like PUCCH) or asidelink control channel. If the starting symbol is associated tocontrol signaling (e.g., on a control channel), the control signalingmay be in response to received signaling (in sidelink or downlink), e.g.representing acknowledgement signaling associated thereto, which may beHARQ or ARQ signaling. An ending symbol may represent an ending symbol(in time) of downlink or sidelink transmission or signaling, which maybe intended or scheduled for the radio node or user equipment. Suchdownlink signaling may in particular be data signaling, e.g. on aphysical downlink channel like a shared channel, e.g. a PDSCH (PhysicalDownlink Shared Channel). A starting symbol may be determined based on,and/or in relation to, such an ending symbol.

Configuring a radio node, in particular a terminal or user equipment,may refer to the radio node being adapted or caused or set and/orinstructed to operate according to the configuration. Configuring may bedone by another device, e.g., a network node (for example, a radio nodeof the network like a base station or eNodeB) or network, in which caseit may comprise transmitting configuration data to the radio node to beconfigured. Such configuration data may represent the configuration tobe configured and/or comprise one or more instruction pertaining to aconfiguration, e.g. a configuration for transmitting and/or receiving onallocated resources, in particular frequency resources. A radio node mayconfigure itself, e.g., based on configuration data received from anetwork or network node. A network node may utilise, and/or be adaptedto utilise, its circuitry/ies for configuring. Allocation informationmay be considered a form of configuration data. Configuration data maycomprise and/or be represented by configuration information, and/or oneor more corresponding indications and/or message/s

Generally, configuring may include determining configuration datarepresenting the configuration and providing, e.g. transmitting, it toone or more other nodes (parallel and/or sequentially), which maytransmit it further to the radio node (or another node, which may berepeated until it reaches the wireless device). Alternatively, oradditionally, configuring a radio node, e.g., by a network node or otherdevice, may include receiving configuration data and/or data pertainingto configuration data, e.g., from another node like a network node,which may be a higher-level node of the network, and/or transmittingreceived configuration data to the radio node. Accordingly, determininga configuration and transmitting the configuration data to the radionode may be performed by different network nodes or entities, which maybe able to communicate via a suitable interface, e.g., an X2 interfacein the case of LTE or a corresponding interface for NR. Configuring aterminal may comprise scheduling downlink and/or uplink transmissionsfor the terminal, e.g. downlink data and/or downlink control signalingand/or DCI and/or uplink control or data or communication signaling, inparticular acknowledgement signaling, and/or configuring resourcesand/or a resource pool therefor.

A resource structure may be considered to be neighbored in frequencydomain by another resource structure, if they share a common borderfrequency, e.g. one as an upper frequency border and the other as alower frequency border. Such a border may for example be represented bythe upper end of a bandwidth assigned to a subcarrier n, which alsorepresents the lower end of a bandwidth assigned to a subcarrier n+1. Aresource structure may be considered to be neighbored in time domain byanother resource structure, if they share a common border time, e.g. oneas an upper (or right in the figures) border and the other as a lower(or left in the figures) border. Such a border may for example berepresented by the end of the symbol time interval assigned to a symboln, which also represents the beginning of a symbol time intervalassigned to a symbol n+1.

Generally, a resource structure being neighbored by another resourcestructure in a domain may also be referred to as abutting and/orbordering the other resource structure in the domain.

A resource structure may general represent a structure in time and/orfrequency domain, in particular representing a time interval and afrequency interval. A resource structure may comprise and/or becomprised of resource elements, and/or the time interval of a resourcestructure may comprise and/or be comprised of symbol time interval/s,and/or the frequency interval of a resource structure may compriseand/or be comprised of subcarrier/s. A resource element may beconsidered an example for a resource structure, a slot or mini-slot or aPhysical Resource Block (PRB) or parts thereof may be considered others.A resource structure may be associated to a specific channel, e.g. aPUSCH or PUCCH, in particular resource structure smaller than a slot orPRB.

Examples of a resource structure in frequency domain comprise abandwidth or band, or a bandwidth part. A bandwidth part may be a partof a bandwidth available for a radio node for communicating, e.g. due tocircuitry and/or configuration and/or regulations and/or a standard. Abandwidth part may be configured or configurable to a radio node. Insome variants, a bandwidth part may be the part of a bandwidth used forcommunicating, e.g. transmitting and/or receiving, by a radio node. Thebandwidth part may be smaller than the bandwidth (which may be a devicebandwidth defined by the circuitry/configuration of a device, and/or asystem bandwidth, e.g. available for a RAN). It may be considered that abandwidth part comprises one or more resource blocks or resource blockgroups, in particular one or more PRBs or PRB groups. A bandwidth partmay pertain to, and/or comprise, one or more carriers.

A carrier may generally represent a frequency range or band and/orpertain to a central frequency and an associated frequency interval. Itmay be considered that a carrier comprises a plurality of subcarriers. Acarrier may have assigned to it a central frequency or center frequencyinterval, e.g. represented by one or more subcarriers (to eachsubcarrier there may be generally assigned a frequency bandwidth orinterval). Different carriers may be non-overlapping, and/or may beneighboring in frequency domain.

It should be noted that the term “radio” in this disclosure may beconsidered to pertain to wireless communication in general, and may alsoinclude wireless communication utilising millimeter waves, in particularabove one of the thresholds 10 GHz or 20 GHz or 50 GHz or 52 GHz or 52.6GHz or 60 GHz or 72 GHz or 100 GHz or 114 GHz. Such communication mayutilise one or more carriers, e.g. in FDD and/or carrier aggregation.Upper frequency boundaries may correspond to 300 GHz or 200 GHz or 120GHz or any of the thresholds larger than the one representing the lowerfrequency boundary.

A radio node, in particular a network node or a terminal, may generallybe any device adapted for transmitting and/or receiving radio and/orwireless signals and/or data, in particular communication data, inparticular on at least one carrier. The at least one carrier maycomprise a carrier accessed based on an LBT procedure (which may becalled LBT carrier), e.g., an unlicensed carrier. It may be consideredthat the carrier is part of a carrier aggregate.

Receiving or transmitting on a cell or carrier may refer to receiving ortransmitting utilizing a frequency (band) or spectrum associated to thecell or carrier. A cell may generally comprise and/or be defined by orfor one or more carriers, in particular at least one carrier for ULcommunication/transmission (called UL carrier) and at least one carrierfor DL communication/transmission (called DL carrier). It may beconsidered that a cell comprises different numbers of UL carriers and DLcarriers. Alternatively, or additionally, a cell may comprise at leastone carrier for UL communication/transmission and DLcommunication/transmission, e.g., in TDD-based approaches.

A channel may generally be a logical, transport or physical channel. Achannel may comprise and/or be arranged on one or more carriers, inparticular a plurality of subcarriers. A channel carrying and/or forcarrying control signaling/control information may be considered acontrol channel, in particular if it is a physical layer channel and/orif it carries control plane information. Analogously, a channel carryingand/or for carrying data signaling/user information may be considered adata channel, in particular if it is a physical layer channel and/or ifit carries user plane information. A channel may be defined for aspecific communication direction, or for two complementary communicationdirections (e.g., UL and DL, or sidelink in two directions), in whichcase it may be considered to have two component channels, one for eachdirection. Examples of channels comprise a channel for low latencyand/or high reliability transmission, in particular a channel forUltra-Reliable Low Latency Communication (URLLC), which may be forcontrol and/or data.

In general, a symbol may represent and/or be associated to a symbol timelength, which may be dependent on the carrier and/or subcarrier spacingand/or numerology of the associated carrier. Accordingly, a symbol maybe considered to indicate a time interval having a symbol time length inrelation to frequency domain. A symbol time length may be dependent on acarrier frequency and/or bandwidth and/or numerology and/or subcarrierspacing of, or associated to, a symbol. Accordingly, different symbolsmay have different symbol time lengths. In particular, numerologies withdifferent subcarrier spacings may have different symbol time length.Generally, a symbol time length may be based on, and/or include, a guardtime interval or cyclic extension, e.g. prefix or postfix.

A sidelink may generally represent a communication channel (or channelstructure) between two UEs and/or terminals, in which data istransmitted between the participants (UEs and/or terminals) via thecommunication channel, e.g. directly and/or without being relayed via anetwork node. A sidelink may be established only and/or directly via airinterface/s of the participant, which may be directly linked via thesidelink communication channel. In some variants, sidelink communicationmay be performed without interaction by a network node, e.g. on fixedlydefined resources and/or on resources negotiated between theparticipants. Alternatively, or additionally, it may be considered thata network node provides some control functionality, e.g. by configuringresources, in particular one or more resource pool/s, for sidelinkcommunication, and/or monitoring a sidelink, e.g. for charging purposes.

Sidelink communication may also be referred to as device-to-device (D2D)communication, and/or in some cases as ProSe (Proximity Services)communication, e.g. in the context of LTE. A sidelink may be implementedin the context of V2x communication (Vehicular communication), e.g. V2V(Vehicle-to-Vehicle), V2I (Vehicle-to-Infrastructure) and/or V2P(Vehicle-to-Person). Any device adapted for sidelink communication maybe considered a user equipment or terminal.

A sidelink communication channel (or structure) may comprise one or more(e.g., physical or logical) channels, e.g. a PSCCH (Physical SidelinkControl CHannel, which may for example carry control information like anacknowledgement position indication, and/or a PSSCH (Physical SidelinkShared CHannel, which for example may carry data and/or acknowledgementsignaling). It may be considered that a sidelink communication channel(or structure) pertains to and/or used one or more carrier/s and/orfrequency range/s associated to, and/or being used by, cellularcommunication, e.g. according to a specific license and/or standard.Participants may share a (physical) channel and/or resources, inparticular in frequency domain and/or related to a frequency resourcelike a carrier) of a sidelink, such that two or more participantstransmit thereon, e.g. simultaneously, and/or time-shifted, and/or theremay be associated specific channels and/or resources to specificparticipants, so that for example only one participant transmits on aspecific channel or on a specific resource or specific resources, e.g.,in frequency domain and/or related to one or more carriers orsubcarriers.

A sidelink may comply with, and/or be implemented according to, aspecific standard, e.g. an LTE-based standard and/or NR. A sidelink mayutilise TDD (Time Division Duplex) and/or FDD (Frequency DivisionDuplex) technology, e.g. as configured by a network node, and/orpreconfigured and/or negotiated between the participants. A userequipment may be considered to be adapted for sidelink communication ifit, and/or its radio circuitry and/or processing circuitry, is adaptedfor utilising a sidelink, e.g. on one or more frequency ranges and/orcarriers and/or in one or more formats, in particular according to aspecific standard. It may be generally considered that a Radio AccessNetwork is defined by two participants of a sidelink communication.Alternatively, or additionally, a Radio Access Network may berepresented, and/or defined with, and/or be related to a network nodeand/or communication with such a node.

Communication or communicating may generally comprise transmittingand/or receiving signaling. Communication on a sidelink (or sidelinksignaling) may comprise utilising the sidelink for communication(respectively, for signaling). Sidelink transmission and/or transmittingon a sidelink may be considered to comprise transmission utilising thesidelink, e.g. associated resources and/or transmission formats and/orcircuitry and/or the air interface. Sidelink reception and/or receivingon a sidelink may be considered to comprise reception utilising thesidelink, e.g. associated resources and/or transmission formats and/orcircuitry and/or the air interface. Sidelink control information (e.g.,SCI) may generally be considered to comprise control informationtransmitted utilising a sidelink.

Generally, carrier aggregation (CA) may refer to the concept of a radioconnection and/or communication link between a wireless and/or cellularcommunication network and/or network node and a terminal or on asidelink comprising a plurality of carriers for at least one directionof transmission (e.g. DL and/or UL), as well as to the aggregate ofcarriers. A corresponding communication link may be referred to ascarrier aggregated communication link or CA communication link; carriersin a carrier aggregate may be referred to as component carriers (CC). Insuch a link, data may be transmitted over more than one of the carriersand/or all the carriers of the carrier aggregation (the aggregate ofcarriers). A carrier aggregation may comprise one (or more) dedicatedcontrol carriers and/or primary carriers (which may e.g. be referred toas primary component carrier or PCC), over which control information maybe transmitted, wherein the control information may refer to the primarycarrier and other carriers, which may be referred to as secondarycarriers (or secondary component carrier, SCC). However, in someapproaches, control information may be sent over more than one carrierof an aggregate, e.g. one or more PCCs and one PCC and one or more SCCs.

A transmission may generally pertain to a specific channel and/orspecific resources, in particular with a starting symbol and endingsymbol in time, covering the interval therebetween. A scheduledtransmission may be a transmission scheduled and/or expected and/or forwhich resources are scheduled or provided or reserved. However, notevery scheduled transmission has to be realized. For example, ascheduled downlink transmission may not be received, or a scheduleduplink transmission may not be transmitted due to power limitations, orother influences (e.g., a channel on an unlicensed carrier beingoccupied). A transmission may be scheduled for a transmission timingsubstructure (e.g., a mini-slot, and/or covering only a part of atransmission timing structure) within a transmission timing structurelike a slot. A border symbol may be indicative of a symbol in thetransmission timing structure at which the transmission starts or ends.

Predefined in the context of this disclosure may refer to the relatedinformation being defined for example in a standard, and/or beingavailable without specific configuration from a network or network node,e.g. stored in memory, for example independent of being configured.Configured or configurable may be considered to pertain to thecorresponding information being set/configured, e.g. by the network or anetwork node.

A configuration or schedule, like a mini-slot configuration and/orstructure configuration, may schedule transmissions, e.g. for thetime/transmissions it is valid, and/or transmissions may be scheduled byseparate signaling or separate configuration, e.g. separate RRCsignaling and/or downlink control information signaling. Thetransmission/s scheduled may represent signaling to be transmitted bythe device for which it is scheduled, or signaling to be received by thedevice for which it is scheduled, depending on which side of acommunication the device is. It should be noted that downlink controlinformation or specifically DCI signaling may be considered physicallayer signaling, in contrast to higher layer signaling like MAC (MediumAccess Control) signaling or RRC layer signaling. The higher the layerof signaling is, the less frequent/the more time/resource consuming itmay be considered, at least partially due to the information containedin such signaling having to be passed on through several layers, eachlayer requiring processing and handling.

A scheduled transmission, and/or transmission timing structure like amini-slot or slot, may pertain to a specific channel, in particular aphysical uplink shared channel, a physical uplink control channel, or aphysical downlink shared channel, e.g. PUSCH, PUCCH or PDSCH, and/or maypertain to a specific cell and/or carrier aggregation. A correspondingconfiguration, e.g. scheduling configuration or symbol configuration maypertain to such channel, cell and/or carrier aggregation. It may beconsidered that the scheduled transmission represents transmission on aphysical channel, in particular a shared physical channel, for example aphysical uplink shared channel or physical downlink shared channel. Forsuch channels, semi-persistent configuring may be particularly suitable.

Generally, a configuration may be a configuration indicating timing,and/or be represented or configured with corresponding configurationdata. A configuration may be embedded in, and/or comprised in, a messageor configuration or corresponding data, which may indicate and/orschedule resources, in particular semi-persistently and/orsemi-statically.

A control region of a transmission timing structure may be an intervalin time and/or frequency domain for intended or scheduled or reservedfor control signaling, in particular downlink control signaling, and/orfor a specific control channel, e.g. a physical downlink control channellike PDCCH. The interval may comprise, and/or consist of, a number ofsymbols in time, which may be configured or configurable, e.g. by(UE-specific) dedicated signaling (which may be single-cast, for exampleaddressed to or intended for a specific UE), e.g. on a PDCCH, or RRCsignaling, or on a multicast or broadcast channel. In general, thetransmission timing structure may comprise a control region covering aconfigurable number of symbols. It may be considered that in general theborder symbol is configured to be after the control region in time. Acontrol region may be associated, e.g. via configuration and/ordetermination, to one or more specific UEs and/or formats of PDCCHand/or DCI and/or identifiers, e.g. UE identifiers and/or RNTIs orcarrier/cell identifiers, and/or be represented and/or associated to aCORESET and/or a search space.

The duration of a symbol (symbol time length or interval) of thetransmission timing structure may generally be dependent on a numerologyand/or carrier, wherein the numerology and/or carrier may beconfigurable. The numerology may be the numerology to be used for thescheduled transmission.

A transmission timing structure may comprise a plurality of symbols,and/or define an interval comprising several symbols (respectively theirassociated time intervals). In the context of this disclosure, it shouldbe noted that a reference to a symbol for ease of reference may beinterpreted to refer to the time domain projection or time interval ortime component or duration or length in time of the symbol, unless it isclear from the context that the frequency domain component also has tobe considered. Examples of transmission timing structures include slot,subframe, mini-slot (which also may be considered a substructure of aslot), slot aggregation (which may comprise a plurality of slots and maybe considered a superstructure of a slot), respectively their timedomain component. A transmission timing structure may generally comprisea plurality of symbols defining the time domain extension (e.g.,interval or length or duration) of the transmission timing structure,and arranged neighboring to each other in a numbered sequence. A timingstructure (which may also be considered or implemented assynchronisation structure) may be defined by a succession of suchtransmission timing structures, which may for example define a timinggrid with symbols representing the smallest grid structures. Atransmission timing structure, and/or a border symbol or a scheduledtransmission may be determined or scheduled in relation to such a timinggrid. A transmission timing structure of reception may be thetransmission timing structure in which the scheduling control signalingis received, e.g. in relation to the timing grid. A transmission timingstructure may in particular be a slot or subframe or in some cases, amini-slot.

Feedback signaling may be considered a form or control signaling, e.g.uplink or sidelink control signaling, like UCI (Uplink ControlInformation) signaling or SCI (Sidelink Control Information) signaling.Feedback signaling may in particular comprise and/or representacknowledgement signaling and/or acknowledgement information and/ormeasurement reporting.

Signaling utilising, and/or on and/or associated to, resources or aresource structure may be signaling covering the resources or structure,signaling on the associated frequency/ies and/or in the associated timeinterval/s. It may be considered that a signaling resource structurecomprises and/or encompasses one or more substructures, which may beassociated to one or more different channels and/or types of signalingand/or comprise one or more holes (resource element/s not scheduled fortransmissions or reception of transmissions). A resource substructure,e.g. a feedback resource structure, may generally be continuous in timeand/or frequency, within the associated intervals. It may be consideredthat a substructure, in particular a feedback resource structure,represents a rectangle filled with one or more resource elements intime/frequency space. However, in some cases, a resource structure orsubstructure, in particular a frequency resource range, may represent anon-continuous pattern of resources in one or more domains, e.g. timeand/or frequency. The resource elements of a substructure may bescheduled for associated signaling.

Example types of signaling comprise signaling of a specificcommunication direction, in particular, uplink signaling, downlinksignaling, sidelink signaling, as well as reference signaling (e.g., SRSor CRS or CSI-RS), communication signaling, control signaling, and/orsignaling associated to a specific channel like PUSCH, PDSCH, PUCCH,PDCCH, PSCCH, PSSCH, etc.).

In the context of this disclosure, there may be distinguished betweendynamically scheduled or aperiodic transmission and/or configuration,and semi-static or semi-persistent or periodic transmission and/orconfiguration. The term “dynamic” or similar terms may generally pertainto configuration/transmission valid and/or scheduled and/or configuredfor (relatively) short timescales and/or a (e.g., predefined and/orconfigured and/or limited and/or definite) number of occurrences and/ortransmission timing structures, e.g. one or more transmission timingstructures like slots or slot aggregations, and/or for one or more(e.g., specific number) of transmission/occurrences. Dynamicconfiguration may be based on low-level signaling, e.g. controlsignaling on the physical layer and/or MAC layer, in particular in theform of DCI or SCI. Periodic/semi-static may pertain to longertimescales, e.g. several slots and/or more than one frame, and/or anon-defined number of occurrences, e.g., until a dynamic configurationcontradicts, or until a new periodic configuration arrives. A periodicor semi-static configuration may be based on, and/or be configured with,higher-layer signaling, in particular RCL layer signaling and/or RRCsignaling and/or MAC signaling.

In this disclosure, for purposes of explanation and not limitation,specific details are set forth (such as particular network functions,processes and signaling steps) in order to provide a thoroughunderstanding of the technique presented herein. It will be apparent toone skilled in the art that the present concepts and aspects may bepracticed in other variants and variants that depart from these specificdetails.

For example, the concepts and variants are partially described in thecontext of Long Term Evolution (LTE) or LTE-Advanced (LTE-A) or NewRadio mobile or wireless communications technologies; however, this doesnot rule out the use of the present concepts and aspects in connectionwith additional or alternative mobile communication technologies such asthe Global System for Mobile Communications (GSM) or IEEE standards asIEEE 802.11ad or IEEE 802.11 ay. While described variants may pertain tocertain Technical Specifications (TSs) of the Third GenerationPartnership Project (3GPP), it will be appreciated that the presentapproaches, concepts and aspects could also be realized in connectionwith different Performance Management (PM) specifications.

Moreover, those skilled in the art will appreciate that the services,functions and steps explained herein may be implemented using softwarefunctioning in conjunction with a programmed microprocessor, or using anApplication Specific Integrated Circuit (ASIC), a Digital SignalProcessor (DSP), a Field Programmable Gate Array (FPGA) or generalpurpose computer. It will also be appreciated that while the variantsdescribed herein are elucidated in the context of methods and devices,the concepts and aspects presented herein may also be embodied in aprogram product as well as in a system comprising control circuitry,e.g. a computer processor and a memory coupled to the processor, whereinthe memory is encoded with one or more programs or program products thatexecute the services, functions and steps disclosed herein.

It is believed that the advantages of the aspects and variants presentedherein will be fully understood from the foregoing description, and itwill be apparent that various changes may be made in the form,constructions and arrangement of the exemplary aspects thereof withoutdeparting from the scope of the concepts and aspects described herein orwithout sacrificing all of its advantageous effects. The aspectspresented herein can be varied in many ways.

Some useful abbreviations comprise

Abbreviation Explanation ACK/NACK Acknowledgment/NegativeAcknowledgement ARQ Automatic Repeat reQuest BER Bit Error Rate BLERBlock Error Rate BPSK Binary Phase Shift Keying BWP Bandwidth Part CAZACConstant Amplitude Zero Cross Correlation CB Code Block CBG Code BlockGroup CDM Code Division Multiplex CM Cubic Metric CORESET ControlResource Set CQI Channel Quality Information CRC Cyclic Redundancy CheckCRS Common reference signal CSI Channel State Information CSI-RS Channelstate information reference signal DAI Downlink Assignment Indicator DCIDownlink Control Information DFT Discrete Fourier Transform DFTS-FDMDFT-spread-FDM DM(-)RS Demodulation reference signal(ing) eMBB enhancedMobile BroadBand FDD Frequency Division Duplex FDE Frequency DomainEqualisation FDF Frequency Domain Filtering FDM Frequency DivisionMultiplex HARQ Hybrid Automatic Repeat Request IAB Integrated Access andBackhaul IFFT Inverse Fast Fourier Transform IR Impulse Response ISIInter Symbol Interference MBB Mobile Broadband MCS Modulation and CodingScheme MIMO Multiple-input-multiple-output MRC Maximum-ratio combiningMRT Maximum-ratio transmission MU-MIMO Multiusermultiple-input-multiple-output OFDM/A Orthogonal Frequency DivisionMultiplex/Multiple Access PAPR Peak to Average Power Ratio PDCCHPhysical Downlink Control Channel PDSCH Physical Downlink Shared ChannelPRACH Physical Random Access CHannel PRB Physical Resource Block PUCCHPhysical Uplink Control Channel PUSCH Physical Uplink Shared Channel(P)SCCH (Physical) Sidelink Control Channel PSS Primary SynchronisationSignal(ing) (P)SSCH (Physical) Sidelink Shared Channel QAM QuadratureAmplitude Modulation OCC Orthogonal Cover Code QPSK Quadrature PhaseShift Keying PSD Power Spectral Density RAN Radio Access Network RATRadio Access Technology RB Resource Block RNTI Radio Network TemporaryIdentifier RRC Radio Resource Control RX Receiver, Reception,Reception-related/side SA Scheduling Assignment SC-FDE Single CarrierFrequency Domain Equalisation SC-FDM/A Single Carrier Frequency DivisionMultiplex/Multiple Access SCI Sidelink Control Information SINRSignal-to-interference-plus-noise ratio SIR Signal-to-interference ratioSNR Signal-to-noise-ratio SR Scheduling Request SRS Sounding ReferenceSignal(ing) SSS Secondary Synchronisation Signal(ing) SVD Singular-valuedecomposition TB Transport Block TDD Time Division Duplex TDM TimeDivision Multiplex TX Transmitter, Transmission,Transmission-related/side UCI Uplink Control Information UE UserEquipment URLLC Ultra Low Latency High Reliability Communication VL-MIMOVery-large multiple-input-multiple-output ZF Zero Forcing ZP Zero-Power,e.g. muted CSI-RS symbol

Abbreviations may be considered to follow 3GPP usage if applicable.

1. Method of operating a receiving radio node in a wirelesscommunication network, the method comprising receiving data signalingbased on a data signaling indication, the data signaling indicationindicating data signaling of an unspecified duration, wherein receivingis based on a stop indication.
 2. Receiving radio node for a wirelesscommunication network, the receiving radio node being adapted forreceiving data signaling based on a data signaling indication, the datasignaling indication indicating data signaling of an unspecifiedduration, wherein receiving is based on a stop indication.
 3. Method ofoperating a transmitting radio node in a wireless communication network,the method comprising transmitting a data signaling indication to areceiving radio node, and transmitting data signaling associated to thedata signaling indication, the data signaling indication indicating datasignaling of an unspecified duration, the method further comprisingtransmitting a stop indication to the receiving radio node. 4.Transmitting radio node for a wireless communication network, thetransmitting radio node being adapted for transmitting a data signalingindication to a receiving radio node, and for transmitting datasignaling associated to the data signaling indication, the datasignaling indication indicating data signaling of an unspecifiedduration, the transmitting radio node further being adapted fortransmitting a stop indication to the receiving radio node.
 5. Thereceiving radio node according to claim 2, wherein the stop indicationis indicated based on error coding and/or an identifier, in particular aCRC and/or RNTI.
 6. The receiving radio node according to claim 2,wherein the stop indication is represented by one of a plurality ofcounters.
 7. The receiving radio node according to claim 2, wherein thestop indication is represented by a signaling sequence, in particular areference signaling sequence.
 8. The receiving radio node according toclaim 2, wherein the receiving radio node is configured with informationcharacterising the stop indication.
 9. The receiving radio nodeaccording to claim 2, wherein the stop indication is carried by the datasignaling.
 10. The receiving radio node according to claim 2, whereinthe stop indication is separate from the data signaling.
 11. Thereceiving radio node according to claim 2, wherein the stop indicationis one of a plurality of stop indications.
 12. The receiving radio nodeaccording to claim 2, wherein the stop indication is included in thelast allocation unit carrying data signaling.
 13. The receiving radionode according to claim 2, wherein the stop indication is represented bycontrol signaling, e.g. on a control channel or stop channel. 14.Program product comprising instructions causing processing circuitry tocontrol and/or perform a method according to claim
 1. 15. Carrier mediumarrangement carrying and/or storing a program product according to claim14.